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ad-lib

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verb [intransitive/transitive] ad-lib pronunciation in British English /ˌæd ˈlɪb/
Word Forms
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present tense
I/you/we/theyad-lib
he/she/itad-libs
present participlead-libbing
past tensead-libbed
past participlead-libbed
  1. to say something in a speech, play etc without preparing or writing it before you say it

    I lost the notes for my talk and had to ad-lib.

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