Mo–tzu play biographical name \ˈmōd-ˈzə\ Definition of Mo–tzu 470?–?391 b.c. originally Mo Ti play \ˈmō-ˈdē\ L. Mi*cius play \ˈmē-sh(ē-)əs\ Chin. philos. Seen and Heard What made you want to look up Mo–tzu? Please tell us where you read or heard it (including the quote, if possible).