extemporaneous UK /ɛksˌtɛm.pɜː(ɹ)ˈeɪn.i.əs/US /əksˌtɛmpɚˈeɪni.əs/ adjective1 •With inadequate preparation or without advance thought; offhand.“Who the devil is there in Ramilly County,” muttered Amory aloud, “who would deliver Verlaine in an extemporaneous tune to a soaking haystack?” — 1920 formsmore extemporaneous · most extemporaneous
