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1. Carried out or performed with little or no preparation; impromptu: an extemporaneous piano recital.
2. Prepared in advance but delivered without notes or text: an extemporaneous speech.
3. Skilled at or given to unrehearsed speech or performance: an accomplished extemporaneous speaker.
4. Provided, made, or adapted as an expedient; makeshift: an extemporaneous policy decision.

[From Late Latin extemporāneus, from Latin ex tempore; see extempore.]

ex·tem′po·ra·ne′i·ty (-pər-ə-nē′ĭ-tē) n.
ex·tem′po·ra′ne·ous·ly adv.
ex·tem′po·ra′ne·ous·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.extemporaneously - without prior preparation; "he spoke extemporaneously"
à la voléeextemporanément
References in classic literature ?
with the single exception perhaps of the tragic muse, when playing extemporaneously on the barrel organ before the East India Company) can parallel.
The same woman who can write snappy, smart dialogue for days was so introverted that she completely avoided situations in which she'd have to speak extemporaneously, be interviewed or face an unknown situation.
This suggests that presidents who were lawyers may be more comfortable than nonlawyers in speaking extemporaneously about Supreme Court decisions.
She spoke of congested highways as an impediment to economic growth in Oregon, adding extemporaneously, "The Legislature cannot go home until we get this done, and I'm not gonna let them.
Hughes offered his remarks extemporaneously without much elaboration or supporting evidence.
He does have to answer regularly and extemporaneously to the opposition.
Prospective volunteers must enjoy teaching, speaking extemporaneously and encouraging others to set and achieve goals.
Whitefield also performed marriages, baptisms, and funerals, and though he may have preached extemporaneously on these occasions, he used the prayer book's liturgies too.
Analyzed in real time, the big data generated from social media can be used to actively engage customers to extemporaneously adjust strategies and tactics based on the insight gleaned.
The same is true for mortality data: the UN figure inevitably cited by news organizations is 300,000, offered by John Holmes, head of UN humanitarian operations; the figure was calculated extemporaneously during a press interview in April 2008--more than six years ago.
Businesspeople often mistakenly assume that because they know their company and industry so well, they can handle the pressure to extemporaneously answer questions with confidence and authenticity.
150) While the general used the talking points, he spoke somewhat extemporaneously to several different large audiences, often leaving out the cautionary note supplied by his SJA.