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English definition of “join in”

join in

phrasal verb with join
 
 
/dʒɔɪn/ verb
to become involved in an activity with other people: The discussion started between John and me, but then everyone joined in.join in with sth All the members of the interviewing panel joined in with questions.join in sth The Chairman of the Committee yesterday joined in the criticism.
(Definition of join in from the Cambridge Business English Dictionary © Cambridge University Press)
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