{v. phr.} 1. To perform a play. * /The seventh grade put on a lovely act for Christmas for the parents./ 2. To pretend. * /"If you always put on an act," her father said, "people will never know who you really are."/
PUT ON AN ACT
Meaning of PUT ON AN ACT in English
Dictionary of English idioms . Словарь английских идиом. 2012