1
general::
Play a role in, share in, participate, as in Will you be taking part in the wedding? or He did not take part in the discussion. [Late 1300s] Also see TAKE ONE'S PART.
American Heritage Idioms
2
general::
Phrase(s): take someone’s part
Fig. to take a side in an argument; to support someone in an argument. • My sister took my mother’s part in the family argument. • You are always taking the part of the underdog!, Phrase(s): take part (in something)
to participate in something. • Bill refused to take part in the game. • Everyone is asked to take part in the celebration.
McGrawhill's American Idioms And Phrasal Verbs