biga.[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.(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.)()To talk big, to talk loudly, arrogantly, or pretentiously.()I talked big to them at first. (De Foe.)()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.)v. t.[OE. biggen, fr. Icel. byggja to inhabit, to build, ba (neut.) to dwell (active) to make ready. See Boor, and Bound.] To build.(Sir W. Scott.)n.[L.] (Antiq.) A two-horse chariot.()