adj.
Pronunciation: ( ˌ )ek- ˌ stem-p ə - ' r ā -n ē - ə s
Function: adjective
Etymology: Late Latin extemporaneus, from Latin ex tempore
Date: 1673
1 a (1) : composed, performed, or uttered on the spur of the moment : IMPROMPTU <an extemporaneous comment> (2) : carefully prepared but delivered without notes or text b : skilled at or given to extemporaneous utterance c : happening suddenly and often unexpectedly and usually without clearly known causes or relationships <a great deal of criminal and delinquent behavior is ⋯ extemporaneous ― W. C. Reckless>
2 : provided, made, or put to use as an expedient : MAKESHIFT <an extemporaneous shelter>
– ex · tem · po · ra · ne · ous · ly adverb
– ex · tem · po · ra · ne · ous · ness noun