Meaning

noun an expression of regret at having caused trouble for someone

noun a formal written defense of something you believe in strongly

noun a poor example

originFrom French apologie, from Late Latin apologia, from Ancient Greek ἀπολογία (apología, “a speech in defence”), from ἀπολογοῦμαι (apologoûmai, “I speak in my defense”), from ἀπόλογος (apólogos, “an account, story”), from ἀπό (apó, “from, off”) (see apo-) + λόγος (lógos, “speech”). Doublet of apologia. By surface analysis, apo- + -logy.

Etymology from Wiktionary, CC BY-SA 3.0