Entry 1 sense Webster, 1913 Self-knowledge /nŏl′ij/ · Self·-knowl·edge · IPA /ˌsɛlfˈnɑl.ɪdʒ/ 01 n. Knowledge of one's self, or of one's own character, powers, limitations, etc. 1. Knowledge of one's self, or of one's own character, powers, limitations, etc.