(intransitive) To do something, particularly to perform or speak, without prior planning or thought; to act in an impromptu manner; to improvise. / (intransitive) To do something in a makeshift way.

Third-person singular simple present indicative form of extemporise

simple past tense and past participle of extemporise

Alternative form of extemporizer

plural of extemporiser

(British spelling) Alternative spelling of extemporization.

present participle of extemporise

plural of extemporisation