Definition from Wiktionary, the free dictionary
- extemporize (mostly US)
- (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.
- (transitive) To make or create extempore.
- (transitive, music) To compose extemporaneously or improvise.