Definition of ad-lib verb from the Oxford Advanced Learner's Dictionary

 

ad-lib

 verb
verb
BrE BrE//ˌæd ˈlɪb//
 
; NAmE NAmE//ˌæd ˈlɪb//
 
[intransitive, transitive]Verb Forms present simple I / you / we / they ad-lib
BrE BrE//ˌæd ˈlɪb//
 
; NAmE NAmE//ˌæd ˈlɪb//
 
he / she / it ad-libs
BrE BrE//ˌæd ˈlɪbz//
 
; NAmE NAmE//ˌæd ˈlɪbz//
 
past simple ad-libbed
BrE BrE//ˌæd ˈlɪbd//
 
; NAmE NAmE//ˌæd ˈlɪbd//
 
past participle ad-libbed
BrE BrE//ˌæd ˈlɪbd//
 
; NAmE NAmE//ˌæd ˈlɪbd//
 
-ing form ad-libbing
BrE BrE//ˌæd ˈlɪbɪŋ//
 
; NAmE NAmE//ˌæd ˈlɪbɪŋ//
 
Producing a play
 
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to say something in a speech or a performance that you have not prepared or practised synonym improvise She abandoned her script and began ad-libbing. ad-lib something I lost my notes and had to ad-lib the whole speech. He ad-libbed his way through the meeting. See related entries: Producing a play Word Origin early 19th cent. (as an adverb): abbreviation of ad libitum.

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