twoa.[OE. two, twa, properly fem. & neut., twei, twein, tweien, properly masc. (whence E. twain), AS. tw, fem. & neut., twgen, masc., t, neut.; akin to OFries. twne, masc., tw, fem. & neut., OS. twne, masc., tw, fem., tw, neut., D. twee, OHG. zwne, zw, zwei, G. zwei, Icel. tveir, tvr, tvau, Sw. tv, Dan. to, Goth. twai, tws, twa; Lith. du, Russ. dva, Ir. & Gael. da, W. dau, dwy, L. duo, Gr. dy`o, Skr. dva. 300. Cf. Balance, Barouche, Between, Bi-, Combine, Deuce two in cards, Double, Doubt, Dozen, Dual, Duet, Dyad, Twain, Twelve, Twenty, Twice, Twilight, Twig, Twine, n., Twist.] One and one; twice one.(Milton.)()One or two, a phrase often used indefinitely for a small number.()n.1. The sum of one and one; the number next greater than one, and next less than three; two units or objects.()2. A symbol representing two units, as 2, II., or ii.()In two, asunder; into two parts; in halves; in twain; as, cut in two.()