threea.[OE. re, reo, ri, AS. r, masc., re, fem. and neut.; akin to OFries. thre, OS. thria, threa, D. drie, G. drei, OHG. dr, Icel. rr, Dan. & Sw. tre, Goth. reis, Lith. trys, Ir., Gael. & W. tri, Russ. tri, L. tres, Gr. trei^s, Skr. tri. 301. Cf. 3d Drilling, Tern, a., Third, Thirteen, Thirty, Tierce, Trey, Tri-, Triad, Trinity, Tripod.] One more than two; two and one.(2 Sam. xxiv. 12.)Three solemn aisles approach the shrine. (Keble.)()n.1. The number greater by a unit than two; three units or objects.()2. A symbol representing three units, as 3 or iii.()Rule of three. (Arith.) See under Rule, n.()