—v.i. 1. to speak extemporaneously: He can extemporize on any of a number of subjects. 2. to sing, or play on an instrument, composing the music as one proceeds; improvise.
3. to do or manage something in a makeshift way.
—v.t. 1. to make or devise extempore.
2. Music.to compose offhand; improvise. Also,esp. Brit.,ex•tem'po•rise".