Meaning

noun a psychological state induced by (or as if induced by) a magical incantation

noun a state of mind in which consciousness is fragile and voluntary action is poor or missing; a state resembling deep sleep

verb attract; cause to be enamored

originThe verb is derived from Middle English traunce, trauncen, trancen (“to move about (?); to prance (?); to trample the ground”) (whence modern English trounce with the same senses, which see for more). The noun is probably derived from the verb.

Etymology from Wiktionary, CC BY-SA 3.0