extemporāˈneous adjective

1. Impromptu
2. Temporary or improvised
3. (of drugs) prepared in a pharmacy for immediate use

extemporāˈneously adverb

extemporāˈneousness noun

extemˈporarily adverb

extemˈporariness noun

extemˈporary adjective

1. Done on the spur of the moment
2. Hastily prepared
3. Speaking extempore
4. Done without preparation
5. Offhand

extemporizāˈtion or extemporisāˈtion noun

extemˈporize or extemˈporise transitive verb or intransitive verb

1. To speak, or compose and play, extempore or without previous preparation
2. To make (a speech) without notes
3. To improvise (a solution, etc)