EXTEM'PORE, adverb extem'pory. [Latin abl.] 1. Without previous study or meditation; without preparation; suddenly; as, to write or speak extempore 2. It is used as an adjective, improperly, at least without necessity; as an extempore dissertation.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI