Apologise vs. Apologize — What's the Difference?

Standard spelling of apologize

Express regret for something that one has done wrong

Same as apologize.

To make excuse for or regretful acknowledgment of a fault or offense.

Defend, explain, clear away, or make excuses for by reasoning;

To make a formal defense or justification in speech or writing.

Acknowledge faults or shortcomings or failing;

To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends

(intransitive) To express regret that a certain event has occurred.

To make an apologia or defense; to act as apologist.

To make an apology or defense.

To make an apology or excuse; to make acknowledgment of some fault or offense, with expression of regret for it, by way of amends; - with for; as, my correspondent apologized for not answering my letter.

To defend.

Acknowledge faults or shortcomings or failing;

Defend, explain, clear away, or make excuses for by reasoning;