I. big adjective
1.
of significant size or scope
a big expanse of mud
big plans
Synonyms: considerable, extensive, hefty, large, large-scale, major, sizable
Related Word: bumper, hulking, whacking, whopping; clumsy, unwieldy; ample, biggish, capacious, commodious, comprehensive, copious, roomy, spacious, voluminous; distended, inflated, swollen
Contrasted words: paltry, piddling, trivial; slight, small; insignificant; minute, tiny, wee
Antonyms: little
2.
Synonyms: large 1, bull, fat, great, husky, oversize
3.
Synonyms: pregnant 1, childing, enceinte, expectant, expecting, gone, gravid, heavy, parous, parturient
4.
Synonyms: full 1, awash, brimful, brimming, chock-full, crammed, crowded, packed, replete, stuffed
Related Word: flushed, overflowing; cloyed, glutted, sated, satiated, satisfied
Idioms: full to bursting ( or overflowing), full to the ears, stuffed to the gills
Contrasted words: empty
5.
Synonyms: important 1, consequential, considerable, material, meaningful, momentous, significant, substantial, weighty
6.
Synonyms: pretentious 3, arty, arty-crafty, high-sounding, imposing, overblown
7.
Synonyms: generous 1, benevolent, chivalrous, considerate, greathearted, lofty, magnanimous
II. ||big adverb
Synonyms: very 1, ||awful, awfully, damned, extremely, greatly, hugely, much, whacking, whopping
III. big noun
Synonyms: notable 1, big boy, ||big cheese, ||biggie, ||big noise, big shot, bigwig, great gun, heavyweight, lion