Definition of walk out phrasal verb from the Oxford Advanced Learner's Dictionary

  

walk out

 phrasal verb
phrasal verb
 
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Phrasal Verbs
(informal) (of workers) to stop working in order to go on strike related noun walkout

walk out (of something)

 
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 to leave a meeting, performance, etc. suddenly, especially in order to show your disapproval They hinted that they would walk out of the peace talks.
(informal) to suddenly leave somebody that you are having a relationship with and that you have a responsibility for synonym desert How could she walk out on her kids?

walk out (on something)

 
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(informal) to stop doing something that you have agreed to do before it is completed I never walk out on a job half done.
See the Oxford Advanced American Dictionary entry: walk out