Meng–tzu play biographical name \ˈməŋ-ˈdzü\ Definition of Meng–tzu ca 371–ca 289 b.c. originally Meng K'o L. Men*cius play \ˈmen-ch(ē-)əs\ Chin. philos. Seen and Heard What made you want to look up Meng–tzu? Please tell us where you read or heard it (including the quote, if possible).