1. [verb] (intransitive) (often followed by ?for?) To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends
2. [verb] (intransitive) To express regret that a certain event has occurred.
3. [verb] (intransitive) (dated) To make an apology or defense; to act as apologist.
4. [verb] Acknowledge faults or shortcomings or failing; 'I apologized for being late'; 'He apologized for the many typoes'.
5. [verb] Defend, explain, clear away, or make excuses for by reasoning; 'rationalize the child's seemingly crazy behavior'; 'he rationalized his lack of success'.
