1. evergreen tree with poisonous needles; wood of yew tree; bow made of yew wood (Archaic). yewyew (ū), v. i. see: yaw.yew yew, n. [oe. ew, as. e?w, īw, eoh; akin to d. ijf, ohg. īwa, īha, g. eibe, icel. &ymacr;r; cf. ir. iubhar, gael. iubhar, iughar, w. yw, ywen, lith. jëva the black alder tree.]