Entry 3 senses · 2 variants Webster, 1913 Withy · With·y · IPA /ˈwɪð.i/ n. a. 01 n. The osier willow (Salix viminalis). See Osier, n. (a). pl. Withies ((#)) 1. The osier willow (Salix viminalis). See Osier, n. (a).(Bot.) See: Osier 2. A withe. See Withe, 1. See: Withe 02 a. Made of withes; like a withe; flexible and tough; also, abounding in withes. 1. Made of withes; like a withe; flexible and tough; also, abounding in withes. “The stream is brimful now, and lies high in this little withy plantation.” — G. Eliot.