'Improvise' definitions:

Definition of 'improvise'

From: WordNet
verb
Perform without preparation; "he extemporized a speech at the wedding" [syn: improvise, improvize, ad-lib, extemporize, extemporise]
verb
Manage in a makeshift way; do with whatever is at hand; "after the hurricane destroyed our house, we had to improvise for weeks" [syn: improvise, extemporize]

Definition of 'Improvise'

From: GCIDE
  • Improvise \Im`pro*vise"\, v. t. [imp. & p. p. Improvised; p. pr. & vb. n. Improvising.] [F. improviser, it. improvvisare, fr. improvviso unprovided, sudden, extempore, L. improvisus; pref. im- not + provisus foreseen, provided. See Proviso.]
  • 1. To compose, recite, or sing extemporaneously, especially in verse; to extemporize; also, to play upon an instrument, or to act, extemporaneously. [1913 Webster]
  • 2. To bring about, arrange, do, or make, immediately or on short notice, without previous preparation and with no known precedent as a guide. [1913 Webster +PJC]
  • Charles attempted to improvise a peace. --Motley. [1913 Webster]
  • 3. To invent, or provide, offhand, or on the spur of the moment; as, he improvised a hammer out of a stone. [1913 Webster]

Definition of 'Improvise'

From: GCIDE
  • Improvise \Im`pro*vise"\, v. i. To produce or render extemporaneous compositions, especially in verse or in music, without previous preparation; hence, to do anything offhand. [1913 Webster]

Synonyms of 'improvise'

From: Moby Thesaurus