Definition of "behest" in English

noun

1. A command, bidding; sometimes also, an authoritative request; now usually in the phrase at the behest of and at one's behest.

2. (obsolete) A vow; a promise.

   • c. 1440, Markaryte Paston, letter to John Paston The time is come that I should send it her, if I keep the behest that I have made.

verb

1. (obsolete) To promise; vow.