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Webster 1913 Edition
Extemporaneous
Ex-temˊpo-ra′ne-ous
,Adj.
 [See 
Extempore
.] Composed, performed, or uttered on the spur of the moment, or without previous study; unpremeditated; off-hand; ad-lib; extempore; extemporary; 
– as, an 
. extemporaneous 
address or productionEx-temˊpo-ra′ne-ous-ly
, adv.
 Ex-temˊpo-ra′ne-ous-ness
,Noun.
Webster 1828 Edition
Extemporaneous
EXTEMPORA'NEOUS
,Adj.
 Composed, performed or uttered at the time the subject occurs, without previous study; unpremeditated; as an extemporaneous address; an extemporaneous production; an extemporaneous prescription.
Definition 2025
extemporaneous
extemporaneous
English
Adjective
extemporaneous (comparative more extemporaneous, superlative most extemporaneous)
- without preparation or advanced thought; offhand
Synonyms
- (without preparation): extemporal (archaic), improvised; see also Wikisaurus:impromptu
Related terms
Translations
without preparation
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