Definition of extemporize verb from the Oxford Advanced American Dictionary

 

extemporize

 verb
verb
NAmE//ɪkˈstɛmpəˌraɪz//
 
[intransitive](formal)Verb Forms present simple I / you / we / they extemporize
 
he / she / it extemporizes
 
past simple extemporized
 
-ing form extemporizing
 
 
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to speak or perform without preparing or practicing synonym improvise
extemporization
 
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NAmE//ɪkˌstɛmpərəˈzeɪʃn//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: extemporize