Composed, performed, or uttered on the spur of the moment, or without previous study; unpremeditated; off-hand; extempore; extemporary; as, an extemporaneous address or production.
- Carried out or performed with little or no preparation; impromptu: an extemporaneous piano recital.
- Prepared in advance but delivered without notes or text: an extemporaneous speech.
- Skilled at or given to unrehearsed speech or performance: an accomplished extemporaneous speaker.
- Provided, made, or adapted as an expedient; makeshift: an extemporaneous policy decision.