The adj big has 13 senses (first 11 from tagged texts)
1. (1114) large, big -- (above average in size or number or quantity or magnitude or extent; "a large city"; "set out for the big city"; "a large sum"; "a big (or large) barn"; "a large family"; "big businesses"; "a big expenditure"; "a large number of newspapers"; "a big group of scientists"; "large areas of the world")
2. (242) big -- (significant; "graduation was a big day in his life")
3. (77) big, large, prominent -- (conspicuous in position or importance; "a big figure in the movement"; "big man on campus"; "he's very large in financial circles"; "a prominent citizen")
4. (24) bad, big -- (very intense; "a bad headache"; "in a big rage"; "had a big (or bad) shock"; "a bad earthquake"; "a bad storm")
5. (22) big -- (loud and firm; "a big voice"; "big bold piano sounds")
11. (3) big, large, magnanimous -- (generous and understanding and tolerant; "a heart big enough to hold no grudges"; "that's very big of you to be so forgiving"; "a large and generous spirit"; "a large heart"; "magnanimous toward his enemies")
12. big, bighearted, bounteous, bountiful, freehanded, handsome, giving, liberal, openhanded -- (given or giving freely; "was a big tipper"; "the bounteous goodness of God"; "bountiful compliments"; "a freehanded host"; "a handsome allowance"; "Saturday's child is loving and giving"; "a liberal backer of the arts"; "a munificent gift"; "her fond and openhanded grandfather")
13. big, enceinte, expectant, gravid, great, large, heavy, with child -- (in an advanced stage of pregnancy; "was big with child"; "was great with child")
Overview of adv big
The adv big has 4 senses (first 2 from tagged texts)
1. (1) big -- (extremely well; "his performance went over big")
2. (1) boastfully, vauntingly, big, large -- (in a boastful manner; "he talked big all evening")
3. big -- (on a grand scale; "think big")
4. big -- (in a major way; "the play failed big at the box office")