apologise v 1: defend, explain, clear away, or make excuses for by reasoning; "rationalize the child's seemingly crazy behavior"; "he rationalized his lack of success" [syn: {apologize}, {excuse}, {justify}, {rationalize}, {rationalise}] 2: acknowledge faults or shortcomings or failing; "I apologized for being late"; "He apologized for the many typoes" [syn: {apologize}]