behestn.[OE. biheste promise, command, AS. behs promise; pref. be- + hs command. See Hest, Hight.]1. That which is willed or ordered; a command; a mandate; an injunction.()To do his master's high behest. (Sir W. Scott.)2. A vow; a promise.()The time is come that I should send it her, if I keep the behest that I have made. (Paston.)v. t. To vow.(Paston.)