Im*prov"i*sate (?), a. [See Improvise.] Unpremeditated; impromptu; extempore. [R.]
Im*prov"i*sate (?), v. t. & i. [imp. & p. p. Improvisated (?); p. pr. & vb. n. Improvisating (?).] To improvise; to extemporize.