Entry 3 senses · 3 variants Webster, 1913 Edder · Ed·der · IPA /ˈɛdɚ/ n. n. v. t. 01 n. An adder or serpent. 1. An adder or serpent.(Zoöl.) [Prov. Eng.] 02 n. Flexible wood worked into the top of hedge stakes, to bind them together. 1. Flexible wood worked into the top of hedge stakes, to bind them together.[Obs.] 03 v. t. To bind the top interweaving edder; as, to edder a hedge. 1. To bind the top interweaving edder; as, to edder a hedge.[Obs.]