Definition of big
significant; "graduation was a big day in his life"
very intense; "a bad headache"; "in a big rage"; "had a big (or bad) shock"; "a bad earthquake"; "a bad storm"
prodigious; "big spender"; "big eater"; "heavy investor"
exhibiting self-importance; "big talk"
feeling self-importance; "too big for his britches"; "had a swelled head"; "he was swelled with pride"
(of animals)
fully developed; "an
adult animal"; "a grown woman"
in a
boastful manner; "he talked big all evening"
on a
grand scale; "think big"
in a
major way; "the
play failed big at the box office"