1. [adv]  in a boastful manner; "he talked big all evening"
2. [adv]  in a major way; "the play failed big at the box office"
3. [adv]  on a grand scale; "think big"
4. [adv]  extremely well; "his performance went over big"
5. [adj]  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"
6. [adj]  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"
7. [adj]  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"
8. [adj]  marked by intense physical force; "a big wind"
9. [adj]  (informal) "graduation was a big day in his life"
10. [adj]  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"
11. [adj]  loud and firm; "a big voice"; "big bold piano sounds"
12. [adj]  (of animals) fully developed; "an adult animal"; "a grown woman"
13. [adj]  very intense; "a bad headache"; "in a big rage"; "had a big (or bad) shock"; "a bad earthquake"; "a bad storm"
14. [adj]  feeling self-importance; "too big for his britches"; "had a swelled head"; "he was swelled with pride"
15. [adj]  exhibiting self-importance; "big talk"
16. [adj]  of very great significance"deciding to drop the atom bomb was a very big decision"; "a momentous event"

Big
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1. \Big\, a. [Compar. {Bigger}; superl. {Biggest}.] [Perh. from
   Celtic; cf. W. beichiog, beichiawg, pregnant, with child, fr.
   baich burden, Arm. beac'h; or cf. OE. bygly, Icel. biggiligr,
   (properly) habitable; (then) magnigicent, excellent, fr. OE.
   biggen, Icel. byggja, to dwell, build, akin to E. be.]
   1. Having largeness of size; of much bulk or magnitude; of
      great size; large. ``He's too big to go in there.''
      --Shak.
   2. Great with young; pregnant; swelling; ready to give birth
      or produce; -- often figuratively.
            [Day] big with the fate of Cato and of Rome.
                                                  --Addison.
   3. Having greatness, fullness, importance, inflation,
      distention, etc., whether in a good or a bad sense; as, a
      big heart; a big voice; big looks; to look big. As applied
      to looks, it indicates haughtiness or pride.
            God hath not in heaven a bigger argument. --Jer.
                                                  Taylor.
   Note: Big is often used in self-explaining compounds; as,
         big-boned; big-sounding; big-named; big-voiced.
   {To talk big}, to talk loudly, arrogantly, or pretentiously.
            I talked big to them at first.        --De Foe.
   Syn: Bulky; large; great; massive; gross.
   

2. \Big\, Bigg \Bigg\, n. [OE. bif, bigge; akin to Icel. bygg,
   Dan. byg, Sw. bjugg.] (Bot.)
   Barley, especially the hardy four-rowed kind.
         ``Bear interchanges in local use, now with barley, now
         with bigg.''                             --New English
                                                  Dict.
   

3. \Big\, Bigg \Bigg\, v. t. [OE. biggen, fr. Icel. byggja to
   inhabit, to build, b?a (neut.) to dwell (active) to make
   ready. See {Boor}, and {Bound}.]
   To build. [Scot. & North of Eng. Dial.] --Sir W. Scott.