public square pub·lics·quare uncommon noun 1. an open area at the meeting of two or more streets Synonymspublic squaresquare 2. a place of assembly for the people in ancient Greece Synonymsagoraforumpublic square Related words Broader terms marketplacetract Narrower terms Trafalgar Squareplaza Parts city WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.