in·ter·ve·nient I. \| ̷ ̷ ̷ ̷|vēnyənt\adjective Etymology: Latin intervenient-, interveniens, present participle of intervenire 1.: being or coming in incidentally or extraneously < intervenient circumstances > 2.: situated or occurring between different points or events : intervening < deep intervenient ravines — C.E.Craddock > 3.: intermediary II. noun (-s) : one that intervenes