significant

1 clearly conveying a special meaning (as one's mood) after remarking that tardiness was on the rise, our boss cast a significant glance my way Synonyms eloquent, meaning, meaningful, pregnant, revealing, revelatory, expressive, suggestiveRelated Words graphic (also graphical), pictorial, vivid; evocative, redolent, reminiscent; sententious, weighty; flavorful, full-bodied, richAntonyms unexpressive

2 indicating something the town's generous library budget is significant of the value its residents place on learning Synonyms denotative, denoting, reflective, indicative, signifying, telltaleRelated Words alluding, allusive, referring; characteristic, symptomatic; demonstrative, exhibiting, expressive; symbolic (also symbolical); connoting, hinting, implying, insinuating, suggestive

3 having great meaning or lasting effect made a significant change in the procedure for applying for citizenship Synonyms big, consequential, earthshaking, earth-shattering, eventful, historic, major, material, meaningful, momentous, monumental, much, important, substantial, tectonic, weightyRelated Words decisive, fatal, fateful, strategic; earnest, grave, heavy, serious, sincere; distinctive, exceptional, impressive, outstanding, prominent, remarkable; valuable, worthwhile, worthy; distinguished, eminent, great, illustrious, noble, notable, noteworthy, outstanding, preeminent, prestigious; famous, notorious, renowned; all-important, central, critical, crucial, essential, key, pivotal, seminal, vitalNear Antonyms paltry, petty, worthless; anonymous, nameless, obscure, uncelebrated, unknownAntonyms inconsequential, inconsiderable, insignificant, little, minor, negligible, slight, small, trifling, trivial, unimportant

4 having great power or influence a producer who is playing a significant role in the creation of the new film Synonyms heavy, heavy-duty, influential, mighty, potent, powerful, puissant, important, strongRelated Words high-level, senior, top; able, capable, competent, effective, efficient; authoritarian, autocratic (also autocratical), despotic, dictatorial, magisterial, tyrannical (also tyrannic); celebrated, distinguished, dominant, eminent, famed, famous, great, illustrious, noble, notable, noteworthy, notorious, outstanding, preeminent, prestigious, prominent, renowned; dynamic, energetic, forceful, high-powered, robust, vigorousNear Antonyms feeble, flimsy, frail, infirm; anonymous, nameless, obscure, uncelebrated, unknown; incapable, incompetent, ineffective, inept, inexpert, unfit, unqualified, unskilled, unskillfulAntonyms helpless, impotent, insignificant, little, powerless, unimportant, weak

5 sufficiently large in size, amount, or number to merit attention paid a significant amount of money for the movie rights to the book Synonyms biggish, good, goodly, handsome, healthy, largish, major, respectable, considerable, sizable (or sizeable), substantial, substantive, tidyRelated Words big, bulky, hefty, hulking, outsize (also outsized), oversize (or oversized), voluminous; astronomical (also astronomic), bumper, colossal, elephantine, enormous, gigantic, great, herculean, huge, immense, jumbo, king-size (or king-sized), mammoth, massive, monstrous, monumental, prodigious, titanic, tremendous, whoppingNear Antonyms measly, minute, paltry, petty, picayune, picayunish, piddling, puny, trifling, trivial, unimportant; marginal, meager (or meagre), slight; little, small, tiny, undersized (also undersize); bitty, diminutive, miniature, pint-size (or pint-sized), pocket, pocket-size (also pocket-sized), pygmy, smallishAntonyms inconsequential, inconsiderable, insignificant, insubstantial, negligible, nominal