5. decoration, adornment, ornamentation, embellishment, trim, dressing, garnish, emblazonment, enhancement; design, illustration, drawing, sketch, picture.

illumine, v. light up, light, brighten; clarify, elucidate, shed or cast light on; enlighten, give insight to, open the eyes of. See - illuminate (defs. 1-3).

illusion, n. 1. fantasy, hallucination, mirage, phantasmagoria, vapor, pipe dream, delusion; phantasm, shadow, specter, chimera, phantom, will-o'-the-wisp; aberration, haunt, fear, haunting fear, nightmare; whimsy, whim, caprice, figment, maggot; flight, flight of fancy, notion, vagary, conceit, imagining, crazy notion or idea, Inf. screwball or wacky idea.
2. fallacy, false notion, mistaken notion, misconception, misbelief, misapprehension, misjudgment, miscalculation.

illusory, adj. 1. deceptive, misleading, beguiling, tricky; delusive, delusory, illusive, illusionary; false, falacious, erroneous, mistaken; untrue, unfactual, wrong, all wrong; specious, seeming.
2. unreal, imaginary, imagined, fancied, nonexistent, all in the mind, all in one's head; fanciful, notional, quixotic, idealistic; chimerical, dreamy, dreamlike, air-built, cloud-built.

illustrate, v. 1. exemplify, give an example, instance, give an instance or case, cite a case in point, tell a story or anecdote about, Rare, example; clarify, clear up or make clear, illuminate, shed light on, make understandable, render intelligible; explain, explicate, describe, elucidate, footnote, comment upon; demonstrate, exhibit, present, run through, show [s.o.] how to do [s.t.].
2. decorate, adorn, embellish, ornament, trim, garnish; illuminate, emblazon, brighten up, dress up; draw, sketch, diagram, make designs or pictures, do artwork.

illustration, n. 1. drawing, sketch, diagram, line drawing, black and white, pen and ink; design, artwork, vignette, frontispiece; depictment, depiction, representation, portrayal, portrait, photograph, figure, cartoon, caricature.
2. example, exemplification, case, typical case, case in point, instance, typical instance, Inf. for instance, anecdote; specimen, sample, exemplar, representative, epitome, exponent, Archaic, ensample; comparison, analogy, similar case.
3. explanation, explication, definition, interpretation, exegesis, commentary, note; clarification, elucidation, illumination; exposition, delineation, outline, demonstration.

illustrative, adj. exemplary, exemplifying, typical, sample, representative, epitomic, epitomical, model; explanatory, elucidative, explicative, expository, com-mentorial; descriptive, expressive, interpretive, ex-egetic; diagrammatic, delineative, pictorial, graphic.

illustrious, adj. 1. renowned, well-known, prominent, famous, famed, popular, well-liked, Inf. name; eminent, preeminent, noted, notable, esteemed, respected, venerable, distinguished, Archaic, eximious.
2. celebrated, acclaimed, touted, much-touted, exalted, honored; glorious, lustrous, brilliant, radiant, shining; great, grand, big-time.

ill will, n. animosity, hostility, inimicalness, invidiousness, abhorrence, aversion; antipathy, opposition, rancor, antagonism, malevolence, malignity, malice; enmity, animus, bad blood, loathing, hatred, hate, detestation; anger, pique, umbrage, resentment, grudge; acrimony, bitterness, virulence, spleen, gall; unfriend-