illuminism 
+ -is.] The principles or claims of illumi- 
nati, or of a sect or the order of Dluminati. 
Also illuHiinatixm. [Bare.] 
illuministic (i-lu-mi-nis'tik), a. [< illumine + 
-isft'c.] Relating to illuminism, or to the Ulu- 
minati. 
illuminize (i-lu'mi-niz), v. t. ; pret. and pp. il- 
lumiuizcd, ppr. illuminizing. [< illumine + -ize.~] 
To initiate in the doctrines or principles of the 
Illuminati. Imp. Diet. 
illuminous (i-lu* mi-nus), a. [Irreg. < illumine + 
-ous, after luminous.'] Bright; clear. [Rare.] 
This life, and all that it contains, to him 
Is but a tissue of illuminous dreams. 
Sir H. Tatjlor, Edwin the Fair, ii. 2. 
illupi (il'u-pi), n. [E. Ind.] An evergreen tree, 
Bassia longifolia, a native of India. The flowers 
are roasted and eaten, and are also boiled to a jelly ; the 
leaves and milky juice of the unripe fruit are used medi- 
cinally ; the bark contains a gummy juice used in rheu- 
matism, and the bark itself is used as a remedy for the cure 
of itch. The seeds furnish an oil called Ulupi-oU. Also 
written Ulupie, ilpa, illipoo, illepe, and elloopa. 
illupi-oil (il'u-pi-oil), re. A fixed solid oil ob- 
tained from the seeds of Bassia longifolia. See 
illupi, and Bassia oil (under Bassia). 
illuret (i-lur'), v. t. [< in- 2 4- lure; a var. of 
rtBwe 1 .] To lure; allure; entice. 
The devil eusnareth the souls of many men by illuring 
them with the muck and dung of this world to undo them 
eternally. Fuller. 
illusion (i-lu'zhqn), n. [= D. illusie = G. Dan. 
Sw. illusion = F\ illusion = Pr. illusio = Sp. ilu- 
sion = Pg. illusao = It. illusione, < L. illusio(n-), 
inlusio(n-), a mocking, jesting, irony, < illudere, 
inludere, pp. illusus, inlusus, play with, mock: 
see illude.'] 1. That which illudes or deceives ; 
an unreal vision presented to the bodily or men- 
tal eye ; deceptive appearance ; false show. 
All her furniture was like Tantalus's gold described by 
Homer, no substance, but mere illusions. 
Burton, Anat. of Mel., p. 447. 
Have you more strange illusions, yet more mists, 
Through which the weak eye may be led to error? 
Beau, and Fl., Woman-Hater, v. i. 
Still less can appearance and illusion be taken as iden- 
tical. For truth or illusion is not to be found in the ob- 
jects of intuition, but in the judgments upon them, so far 
as they are thought. It is therefore quite right to say 
that the senses never err, not because they always judge 
rightly, but because they do not judge at all. 
Kant, Critique of Pure Reason (tr. by Max Jiuller), p. 293. 
The cleverest, the acutest men are often under an illu- 
sion about women ; . . . their good woman is a queer 
thing, half doll, half angel; their bad woman almost 
always a fiend. Charlotte Bronte, Shirley, xx. 
Specifically 2. In psycliol., a false perception 
due to the modification of a true perception by 
the imagination : distinguished from false ap- 
pearances due to the imperfection of the bodily 
organs of sense, such as irradiation, and from 
hallucinations, into which no true perception 
enters. See hallucination, 2. 3. The act of de- 
ceiving or imposing upon any one ; deception ; 
delusion; mockery. 
I told my lord the duke, by the devil's illusions 
The monk might be deceiv'd. Shak., Hen. VIII., i. 2. 
In Cappadocia was seated the Citie Comana, wherein 
was a Temple of Bellona, and a great multitude of such as 
were there inspired and rauished by deuillish illusion. 
Purehas, Pilgrimage, p. 320. 
This world is all a fleeting show, 
For man's illusion given. 
Moore, This World is all a Fleeting Show. 
The daring was only an illusion of the spectator. 
Emerson, Courage. 
4. A thin and very transparent kind of tulle. 
Fantastic Illusion, a perception which is influenced 
by an excited imagination, as when a bush is supposed to 
be a bear. Physiological Illusion, an illusion in which 
perception is influenced by memory and ordinary expec- 
tation, as when one fails to detect a typographical error : 
same as illusion, 2. =Syn. Delusion, Illusion, etc. See 
delusion. 
illusionable (i-lu'zhon-a-bl), . [< illusion + 
-able.'] Subject to illusions; liable to be de- 
ceived ; easily imposed upon. [Rare.] 
Burke was not a young poet, but an old and wary states- 
man, . . . one who had been in the maturity of his powers 
and reputation when those illusionable youths [Words- 
worth and Coleridge] were in their cradles. 
The Academy, Sept. 6, 1879, p. 187. 
illusionist (i-lu'zhon-ist), n. [< illusion + -ist.'] 
1. One who is subject to illusion; one who 
trusts in illusions. 
The man of sense is the visionary or illusionist, fancy- 
ing things as permanencies, and thoughts as fleeting phan- 
toms. Alwtt, Tablets, p. 174. 
2. One who produces illusions for deception or 
entertainment; specifically, a sleight-of-hand 
performer. 
Jugglers, and illusionists, and sleight-of-hand perform- 
ers of every grade, prefer examining committees com- 
posed of leading citizens and instinctively dread the 
2990 
criticism of children and of day-laborers, who, being un- 
able to read or write, or to think or reason according to 
the books, are obliged to trust their instincts. 
Pop. Sci. Mo., XIII. 337. 
illusive (i-lu'siv), a. [= Sp. ilusivo = Pg. illii- 
sivo; < L. as if *illusivus, < illudere, inlndere, 
pp. illusus, inlusus, illude : see illude.j Deceiv- 
ing by illusion ; deceitful ; false ; illusory. 
I am that Truth, thou some illusive spright. 
. Jonson, The Barriers. 
In yonder mead behold that vapour 
Whose vivid beams illusive play ; 
Far off it seems a friendly taper 
To guide the traveller on his way. 
J. G. Cooper, Tomb of Shakspeare. 
illusively (i-lu'siv-li), adv. In an illusive man- 
ner. 
illusiveness (i-lu'siv-nes), n. The quality of 
being illusive ; deception ; false show. 
illusor (i-lu'sor), n. [< LL. illusor, inlusor, a 
mocker, scoffer, < L. illudere, inludere, pp. illu- 
sus, inlusus, mock, Ulude : see illude."] A de- 
ceiver; a mocker. [Rare.] 
The English lords, who then held the king in tutelage, 
. . . refused him [Leo V. of Armenia] in the first instance 
his passport said that though he proffered peace he only 
wanted money ; he was an illusor, and they would have 
nothing to do with him. 
Stubbs, Medieval and Modern Hist., p. 197. 
illusory (i-lu'so-ri), a. and n. [= P. illusoire = 
Sp. ilusorio = Pg. It. illusorio, < LL. illusor, in- 
lusor, a mocker, < L. illudere, inludere, pp. illu- 
sus, inlusus, mock: see illude.'] I. a. Causing 
illusion; deceiving or tending to deceive by 
false appearances; fallacious. 
Illusory creations of imagination. J. Caird. 
A wider scope of view, and a deeper insight, may see 
rank, dignity, and station all proved illusory, so far as 
regards their claim to human reverence. 
Hawthorne, Seven Gables, viii. 
= Syn. Deceptive, delusive. See delusion. 
Il.t . An illusion; a cheat. Nares. 
To trust this traitor upon oath is to trust a divell uppon 
his religion. To trust him uppon pledges, is a meare il- 
lusorye. Letter of Queen Elizabeth (1699). 
illustrable (i-lus'- or il'us-tra-bl), a. [< L. as 
if *ilhistrabilis, < illustrare, light up: see illus- 
trate.'] Capable of being illustrated ; admitting 
of illustration. 
Who can but magnifie the power of decussation, inser- 
vient to contrary ends, solution and consolidation, union 
and division illustrable from Aristotle in the old nucifra- 
giutn or nut-cracker. Sir T. Browne, Garden of Cyrus, ii. 
illustrate (i-lus'- or il'us-trat), v. t. ; pret. and 
pp. illustrated, ppr. illustrating. [< L. illus- 
tratus, inlustratus, pp. of illustrare, inlustrare 
(> It. illustrare = Pg. illustrar = Sp. ilustrar 
= F. illustrer), light up, make light, illumi- 
nate, < illustris, inlustris, lighted up, bright: 
see illustrious.'] 1. To illuminate ; make clear, 
bright, or luminous. [Archaic.] 
He had a star to illustrate his birth ; but a stable for 
his bedchamber. Jer. Taylor, Works (ed. 1836), I. 807. 
Swamps and twilight woods which no day illustrates. 
Thoreau, Walden, p. 136. 
2. To give honor or distinction to; make dis- 
tinguished or illustrious ; glorify. 
Your honour's sublimity doth illustrate this habitation. 
Shirley, Maid's Revenge, ill. 2. 
Matter to me of glory, whom their hate 
Illustrates. Milton, P. L., v. 739. 
Jurists turned statesmen have illustrated every page, 
every year of our annals. R. Choate, Addresses, p. 136. 
3. To make plain and conspicuous to the mind ; 
display vividly ; also, to make clear or intelligi- 
ble; elucidate. 
The sense was dark ; 'twas therefore fit 
With simile to illustrate it. 
Cowper, To Robert Lloyd, 1. 62. 
We alluded to the French Revolution for the purpose 
of illustrating the effects which general spoliation pro- 
duces on society. Macaulay, West. Rev. Def. of Mill. 
Instead of illustrating the events which they narrated 
by the philosophy of a more enlightened age, they judged 
of antiquity by itself alone. Maeaulay, History. 
Each new fact illustrates more clearly some recognized 
law. H. Spencer, Social Statics, p. 32S. 
4. To elucidate or ornament by means of pic- 
tures, drawings, etc. (a) To furnish with pictorial 
illustrations : as, to illustrate a book. (6) To grangerize. 
illustrate! (i-lus'- or il'us-trat), a. [< L. illux- 
tratus, pp.: see the verb.] Famous; renowned; 
illustrious. 
The right reuerend and illustrate lord. 
Hakluyt's Voyayes, II. 73. 
The king's command, and this most gallant, ilfastrate, 
and learned gentleman. Shak., L. L. L, v. 1. 
illustration (il-us-tra'shon), . [= D. niitxtm- 
tie = G. Dan. Sw. illustration = F. illustration 
= Sp. ilustracion = Pg. illustraqao = It. illits- 
illustriously 
trazione, < 'L.illustratio(n-),inlustratio(n-'), vivid 
representation (in rhet.), < illustrare, inlustrare, 
light up, illustrate : see illustrate.'] 1. The act 
of illustrating, or of rendering clear or obvious ; 
explanation ; elucidation ; exemplification. 
Analogy, however, is not proof, but illustration. 
Stubbs, Const Hist., 9. 
2. The state of being illustrated or illumined. 
[Obsolete in the literal sense.] 
One Conradus, a devout priest, had such an illustration, 
such an irradiation, such a coruscation, such a light at 
the tops of those fingers which he used in the consecra- 
tion of the sacrament, as that by that light of his fingers' 
ends he could read in the night as well as by so many can- 
dles. Donne, Sermons, viii. 
The incredulous world had, in their observation, slipped 
by their true prince, because he came not iu pompous 
and secular illustrations. 
Jer. Taylor, Works (ed. 1835), I. 43. 
3. That which illustrates. Specifically (a) A com- 
parison or an example intended for explanation or cor- 
roboration. 
A graver fact, enlisted on your side, 
May furnish illustration, well applied. 
Cowper, Conversation, 1. 206. 
(6) A pictorial representation, map, etc., placed in a book 
or other publication to elucidate the text. 
4. Illustriousness ; distinction. [Rare.] 
It would be a strange neglect of a beautiful and ap- 
proved custom ... if the coUege in which the intellec- 
tual life of Daniel Webster began, and to which his name 
imparts charm and illustration, should give no formal ex- 
pression to her grief in the common sorrow. 
S. Choate, Addresses, p. 241 
illustrative (i-lus'tra-tiv), a. [< illustrate + 
-ive.~] Tending to illustrate, (o) Tending to eluci- 
date, explain, or exemplify : as, an argument or a simile 
illustrative of a subject. 
Purging and pruning with all Industrie . . . 
What's dull or flaccid, nought illustrative. 
Dr. H. More, Psychathanasia, I. H. 41. 
(dt) Tending to make glorious or illustrious ; honorific. 
illustratively (i-lus'tra-tiv-li), adv. By way 
of illustration or elucidation. 
They being many times delivered hieroglyphically, met- 
aphorically, illustratively, and not with reference unto ac- 
tion. Sir T. Browne, Vulg. Err., ir. 12. 
illustrator (i-lus'- or il'us-tra-tor), n. [= F. 
illustratcur = Sp. ilitstrador = Pg. illustrador = 
It. illustratore, < LL. illustrator, inlustrator, an 
enlightener, < L. illustrare, inlustrare, illustrate : 
see illustrate."] 1. One who illustrates, or ren- 
ders bright, clear, or plain ; one who exemplifies 
something in his own person. 
To the right gracious illustrator of virtue . . . theEarle 
of Montgomrie. Chapman, Ded. of Sonnet. 
2. One who draws pictorial illustrations. 
The finest work of the illuminator, the illustrator, and 
the binder. . 0. W. Holmes, The Atlantic, LX. 219. 
illustratory (i-lus 'tra-to-ri), a. f< illustrate 
+ -m-y.~] Serving to illustrate; illustrative. 
[Rare.] 
illustret,'- < [< F. illustrer, illustrate: see il- 
lustrate.] To illustrate. 
All illustred with Lights radiant shine. 
Sylvester, tr. of Du Bartas's Weeks, i. 1. 
illustrious (i-lus'tri-us), a. [= F. illustre = Sp. 
ilustre = Pg. It. illustre, < L. illustris, inlustris, 
lighted up, bright, clear, manifest, honorable, 
illustrious, < in, in, -t- "lustrum, light (ML. a 
window) : see luster. Cf. illustrate.] If. Pos- 
sessing luster or brilliancy ; luminous ; bright ; 
shining. 
The Clifl parted in the midst, and discovered an illus- 
trious concave, filled with an ample and glistering light. 
B. Jonson, Hue and Cry. 
Quench the light ; thine eyes are guides illustrious. 
Fletcher and Rowley, Maid in the Mill, iv. 3. 
2. Distinguished by greatness, genius, etc.; 
conspicuous; renowned; eminent: as, an il- 
lustrious general or magistrate; an illustrious 
prince or author. 
There goes the parson, illustrious spark ! 
And there, scarce less illustrious, goes the clerk ! 
Cowper, On Observing Some Names of Little Note. 
3. Conferring luster or honor ; brilliant; tran- 
scendent; glorious. 
His right noble mind, illustrious virtue, 
And honourable carriage. Shak., 1. of A., lit. 2. 
Illustrious acts high raptures do infuse, 
And every conqueror creates a muse. 
Waller, Panegyric on Cromwell. 
=Syn. 2 and 3. Distinguished, Eminent, etc. (see fa- 
mous); remarkable, signal, exalted, noble, glorious, 
illustriously (i-lus'tri-us-li), adv. In an illus- 
trious manner; conspicuously; eminently; glo- 
riously. 
He disdained not to appear at festival entertainments, 
that he might more illustriously manifest his charity. 
Bp. Atterbmy. 
