Carried out with no preparation; impromptu.

Without preparation; extemporaneously.

Something improvised.

plural of extempore

The act of extemporizing; the act of doing anything extempore.

(intransitive) To perform or speak without prior planning or thought; to act in an impromptu manner; to improvise.

simple past tense and past participle of extemporize

Third-person singular simple present indicative form of extemporize

present participle of extemporize

(archaic) Extemporaneous.