introversion 
version. Cf. introvert.] The act of introvert- 
ing, or the state of being introverted ; a turn- 
ing or directing inward, physical or mental. 
This introversion of my faculties, wherein I regard my 
own soul as the image of her Creator. 
Bp. Berkeley, Guardian, No. 89. 
introversive (in-tro-ver'siv), a. [< L. introver- 
SIIK, turned toward the inside, + -ire.] Turn- 
ing within ; having an inward or internal direc- 
tion. Also introvertive. 
When we come to mental derangements, introversive 
study is obviously fruitless. Pop. Set. Mo. , XXV. 267. 
introvert (in-tro-verf), v. t. [< L. intro, with- 
in, 4- vertere, turn : see verse. Cf . invert, etc.] 
1. To turn within; direct inward or interiorly. 
His awkward gait, his introverted toes. 
Cowper, Task, iv. 633. 
Struggling, with introverted effort, to disentangle a 
thought L. Wallace, Ben-Hur, p. 445. 
2. In zool., to turn in, or invert; insheathe a 
part of within another part. 
introvert (in'tro-vert), n. [< introvert, v] That 
which is introverted; in zool., some part or or- 
gan which is turned in upon itself, or intus- 
suscepted. 
We find that the anterior portion of the body of the 
polypide can be pulled into the hinder party as the finger 
of a glove may be tucked into the hand. It is in fact an 
introvert. E. R. Lankester, Encyc. Brit., XIX. 431. 
introvertive (in-tro-ver'tiv), a. [< introvert + 
-ive] Same as introversive. 
Natures reflective, introvertive, restless. 
Faiths of the World, p. 37. 
intrude (iu-tr5d'), . ; pret. and pp. intruded, 
ppr. intruding. [= OF. intrure, intruire, < L. 
intrudere, thrust in (refl. thrust oneself in), < in, 
in, + trudere, thrust, push, crowd : cf . extrude, 
obtrude.'] I. trans. If. To thrust in; bring in 
forcibly. 
An there come e'er a citizen gentlewoman in my name, 
let her have entrance, I pray you ; . . . there she is ! good 
master, intrude her. B. Jonson, Cynthia's Eevels, v. 2. 
If it [a clyster] should be intruded up by force, it cannot 
so quickly penetrate to the superior parts. 
Greenhill, Art of Embalming, p. 273. 
2. To thrust or bring in without necessity or 
right; bring forward unwarrantably or inap- 
propriately : often used reflexively. 
Our fantasy would intrude a thousand fears, suspicions, 
chimeras, upon us. Burton, Anat. of Mel. , p. 329. 
The envy of the class which Frederic quitted, and the 
civil scorn of the class into which he intruded himself, 
were marked in very significant ways. 
Macaulay, Frederic the Great. 
3. To push or crowd in ; thrust into some un- 
usual, improper, or abnormal place or position : 
as, intruded rocks or dikes in a geological for- 
mation. In entomology an intruded part or organ is 
one that is nearly concealed in a hollow of the support- 
ing parts, only the apex being visible. 
Their capitals are intruded between the triforium arches, 
appearing as if the vault had pressed them from their 
proper station on the clerestory string-course. 
The Century, XXXVI. 594. 
4f. To enter forcibly ; invade. 
Why should the worm intrude the maiden bud? 
Shak., Lucrece, 1. 848. 
Intruded head, a head nearly withdrawn into the pro- 
thorax, as in certain Coleoptera. 
II. intrans. To come or appear as if thrust 
in; enter without necessity or warrant; espe- 
cially, to come in unbidden and uuweleomely: 
as, to intrude upon a private circle; to intrude 
where one is not wanted. 
Where you're always welcome, you never can intrude. 
Steele, Lying Lover, i. 1. 
Some men are placed in posts of danger, and to these 
danger comes in the way of duty ; but others must not in- 
trude into their honourable office. 
J. H. Newman, Parochial Sermons, i. 163, 
= Syn. Encroach upon, Infringe upon, etc. See trespass, v. i. 
Intrude, Obtrude. The essential difference between these 
words lies in the prepositions: intrude, to thrust one's 
self into places, invading privacy or private rights ; 06- 
trude, to thrust one's self out beyond modesty or the lim- 
its proper to ourselves, and offensively against the atten- 
tion, etc., of others. 
intruder (in-tro'd6r), n. One who intrudes; 
one who thrusts himself in, or enters where he 
has no right or is not welcome. 
Go, base intruder! overweening slave ! 
Shak., T. G. of V., ill. 1, 157. 
intrudingly (in-tro'ding-li), adv. By intrud- 
ing; intrusively. 
I thrust myself intrudingly upon you. 
Steele, Lying Lover, i. 1. 
intrudresst (in-tro'dres), n. [< intruder + 
-ess.] A female intruder. 
Joash should recover his rightful throne from the un- 
just usurpation of Athaliah, an idolatrous intrudress there- 
into. Fuller, Pisgah Sight. 
3166 
intrunkt (in-trungk'), v. t. [< in- 2 + trunk.] 
To inclose as in a trunk ; incase. 
Had eager lust intrunked my conquered soul, 
I had not buried living joys in death. 
Ford, Love's Sacrifice, v. 3. 
intruse (in-tros'), a. [< L. intrusus, pp. of in- 
trudere, thrust in.] In bot., pushed or project- 
ing inward. A. Gray. 
intrusion (in-tro'zhon), n. [= F. intrusion = 
Sp. intrusion = Pg. "intrusao = It. intrusione, < 
ML. intrusio(n-), a thrusting in, < L. intrudere, 
pp. intrusus, thrust in: see intrude.] 1. The 
act of intruding; the act of entering without 
warrant or justification ; unbidden, unwelcome, 
or unfit entrance into or upon anything. 
Why this intrusion f 
Were not my orders that I should be private? 
Addiion, Cato, v. 2. 
Who feared the pale intrusion of remorse 
In a just deed ? Shelley, The Cencl, iii. 2. 
2. Specifically, in law : (a) A wrongful entry 
after the determination of a particular estate, 
say for life, and before the freehold remainder- 
man or reversioner can enter. Minor, (b) In 
Eng. law, any trespass committed on the public 
lands of the crown, as by entering thereon with- 
out title, holding over after a lease is deter- 
mined, taking the profits, cutting down timber, 
and the like, (c) Usurpation, as of an office. 
3. A thrusting or pushing in, as of something 
out of place; irregular or abnormal entrance 
or irruption: as, an intrusion of foreign mat- 
ter; the intrusion of extrinsic rocks or dikes in 
a geological formation. See intrusive rocks, un- 
der intrusive. 
The composition is thus better than that of the front 
iteelf, as there are two harmonious stages in the same 
style, without any intrusion of foreign elements. 
E. A. Freeman, Venice, p. 249. 
Action of ejection and intrusion. See ejection. In- 
formation of Intrusion. See information. 
intrusions! (in-tro'zhon-al), a. [< intrusion + 
-al] Of or belonging to intrusion ; noting in- 
trusion. 
intrusionist (in-tro'zhon-ist), n. [< intrusion 
+ -ist] One who intrudes, or favors intrusion ; 
specifically, one of those in the Established 
Church of Scotland who denied the right of a 
parish or congregation to resist or object to 
the settlement or appointment of an obnoxious 
minister by a patron. The exercise of this right of 
presenting or appointing a minister against the wishes of 
the congregation led to much controversy, and was one 
of the causes of the disruption in 1843, when the non- 
intrusionists formed themselves into the Free Church of 
Scotland. Church patronage was abolished in Scotland 
in 1874. See non-intrusionist and patronage. 
intrusive (in-tro'siv), a. [< L. intrudere, pp. 
intrusus, thrust in (see intrude), + -ive] 1. 
Apt to intrude ; coming unbidden or without 
welcome; appearing undesirably: as, intrusive 
thoughts or guests. 
Let me shake off the intrusive cares of day. 
Thomson, Winter, i. 207. 
2. Done or effected by intrusion; carried out 
by irregular or unauthorized entrance : as, in- 
trusive interference. 
The shaft sunk from the top [of a mound] showed sev- 
eral intrusive burials. Science, III. 79. 
3. Thrust in out of regular place or order ; in- 
troduced from an extraneous source; due to 
intrusion or irregular entrance. 
The number and bulk of the intrusive masses of differ- 
ently coloured porphyries, injected one into another and 
intersected by dikes, is truly extraordinary. 
Darmn, Geol. Observations, ii. 513. 
The greater gods of Greece . . . were the intrusive gods, 
the divinities of new comers into the land. 
Keary, Prim. Belief, p. 214. 
Intrusive rocks, in geol., rocks which have made their 
way up from below into another rock or series of beds. 
As generally used by geologists at the present time, the 
phrase refers only to those rocks often styled Plutonic, or 
such as are revealed at the surface by erosion of a certain 
thickness of overlying rock. Masses which have come 
up to the surface in the manner of ordinary volcanic rock 
would not be called intrusive. 
intrusively (in-tro'siv-li), adv. In an intrusive 
manner; by intrusion. 
intrusiveness (in-tro'siv-nes), n. The charac- 
ter or quality of being intrusive. 
intrusort (in-trb"sor), n. [ME. intrusour, < ML. 
intrusor, < L. intrudere, pp. intrusus, intrude: 
see intrude] An intruder. Lydgate. 
intrust (in-trust'), v. t. [Also entrust; < in-Z, 
en- 1 , + trust] 1. To consign or make over as 
a trust; transfer or commit in trust; confide: 
followed by to. 
I hope . . . that I may have the liberty to intrust, my 
neck to the fidelity of my own feet, rather than to those of 
my horse. Cotton, in Walton's Angler, ii. 2->a. 
intuition 
Besides the loftiest part of the work of Providence, en- 
trusted to the Hebrew race, there was other work to do, and 
it was done elsewhere. Gladstone, Might of Right, p. 10S. 
2. To invest, as with a trust or responsibility; 
endue, as with the care or fiduciary possession 
of something: followed by with. 
The joy of our Lord and master, which they only are ad- 
mitted to who are careful to improve the talents they are 
intruded withall. Bp. Wilkins, Natural Keligion, ii. 8. 
In a republic, every citizen is himself in some measure 
intrusted irith the public safety, and acts an important 
part for it* weal or woe. Story, Misc. Writings, p. 513. 
=Syn. 1. Confide, Consign, etc. See cotnmit. 
intubation (iu-tu-ba'shon), n. [< L. in, in, + 
tubus, tube, + -dtion] The act of inserting a 
tube into some orifi ce . intubation of the larynx, 
the insertion of a specially designed tube into the glottis 
to keep it patent, as in diphtheritic obstruction : a substi- 
tute for tracheotomy. 
intuit (in'tu-it), v.; pret. and pp. intuited, ppr. 
intuiting. [Also intuite ; < L. intuitus, pp. of in- 
tueri, look at or upon, observe, regard, contem- 
plate, consider, < in, in, on, + tweri, look: see 
tuition, tutor.] I. trans. To know intuitively 
or by immediate perception. 
If there are no other origins for right and wrong than 
. . . [the] enunciated or intuited divine will, then, as al- 
leged, were there no knowledge of the divine will. 
H. Spencer, Data of Ethics, p. 50. 
II. intrans. To receive or. assimilate know- 
ledge by direct perception or comprehension. 
God must see, he must intuit, so to speak. 
De Quincey, Rhetoric. 
The passage from the Known to the Unknown is one of 
constant trial. We see, and from it infer what is not seen ; 
we intuit , and conclude. 
O. H. Lewes, Probs. of Life and Mind, II. ill. 7. 
intuition (in-tu-ish'on), n. [= F. intuition = 
Sp. intuicion = Pg. 'intuifSo = It. intuizione, < 
ML. intuitio(n-), a looking at, immediate cog- 
nition, < L. intueri, look at, consider: see in- 
tuit] If. A looking on ; a sight or view. 
His [Christ's] disciples must not only abstain from the 
act of unlawful concubinate, but from the impurer intui- 
tion of a wife of another man. 
Jer. Taylor, Works (ed. 1835), I. 215. 
2. Direct or immediate cognition or perception ; 
comprehension of ideas or truths independently 
of ratiocination; instinctive knowledge of the 
relations or consequences of ideas, facts, or ac- 
tions. 
No doubt, with Philolaus the motion of the earth was 
only a guess, or, if you like, a happy intuition. 
Max Mutter, Sci. of Lang., 1st ser., p. 29. 
3. Specifically, in philos., an immediate cogni- 
tion of an object as existent. 
The term intuition is not unambiguous. Besides its 
original and proper meaning (as a visual perception), it 
has been employed to denote a kind of apprehension, and 
a kind of judgment. Under the former head, intuition 
or intuitive knowledge has been used in the six following 
significations : a. To denote a perception of the actual 
and present, in opposition to the abstractive knowledge 
which we have of the possible in imagination and of the 
past in memory, b. To denote an immediate apprehen- 
sion of a thing in itself, in contrast to a representative, 
vicarious, or mediate apprehension of it, in or through 
something else. (Hence, by Fichte, Schelling, and others, 
Intuition is employed to designate the cognition as op- 
posed to the conception of the Absolute.) c. To denote 
the knowledge which we can adequately represent in 
imagination, in contradistinction to the symbolical know- 
ledge which we cannot image, but only think or conceive, 
through and under a sign or word. (Hence, probably, 
Kant's application of the term to the forms of the sensi- 
bility the imaginations of space and time in contrast 
to the forms or categories of the understanding.) d. To 
denote perception proper (the objective), in contrast to 
sensation proper (the subjective), in our sensitive con- 
sciousness, e. To denote the simple apprehension of a 
notion, in contradistinction to the complex apprehension 
of the terms of a proposition. Under the latter head it 
has only a single signification, viz. : f. To denote the 
immediate affirmation by the intellect, that the predicate 
does or does not pertain to the subject, in what are called 
self-evident propositions. All these meanings, however, 
with the exception of the fourth, have this in common, 
that they express the condition of an immediate in oppo- 
sition to mediate knowledge. 
Sir W. Hamilton, Reid's Works, p. 759, note A, 5. 
The term intuition will be taken as signifying a cogni- 
tion not determined by a previous cognition of the same 
object, and therefore so determined by something out of 
the consciousness. The word intuitus first occurs as a 
technical term in St. Anselm's Monologium. He wished 
to distinguish between our knowledge of God and our 
knowledge of finite things (and, in the next world, of God 
also); and, thinking of the saying of St. Paul, " Videmus 
nunc per speculum in aenigmate : tune autcm facie ad 
faciem," lie called the former speculation and the latter 
intuition. This use of "speculation" did not take root, 
because that word already had another exact and widely 
different signification. In the middle ages the term "in- 
tuitive cognition " had two principal senses : 1st, as op- 
posed to abstractive cognition, it meant the knowledge of 
the present as present, and this is its meaning in Anselm ; 
but, 2d, as no intuitive cognition was allowed to be de- 
termined by a previous cognition, it came to be used as 
the opposite of discursive cognition (see Scotus), and tins 
is nearly the sense in which I employ it. C. S. Peirce. 
