An apologia (Latin for apology, from Greek ἀπολογία, "speaking in defense") is a formal defense of an opinion, position or action.[1][2] The term's current use, often in the context of religion, theology and philosophy, derives from Justin Martyr's First Apology (AD 155–157) and was later employed by John Henry Newman's Apologia Pro Vita Sua (English: A Defense of One's Own Life) of 1864,[3] which presented a formal defense of the history of his Christian life, leading to his acceptance by the Catholic Church in 1845.[4] In modern usage, apologia describes a formal defense and should not be confused with the sense of the word 'apology' as an expression of regret; however, apology may mean apologia,[5] depending on the context of use.
Apologia: A formal written defence of one's opinions or conduct.
apologia: A formal defense or justification.
'from Greek apologia "a speech in defense," from apologeisthai "to speak in one's defense'
Apology usually applies to an expression of regret for a mistake or wrong with implied admission of guilt or fault and with or without reference to mitigating or extenuating circumstances. ... Apologia implies not admission of guilt or regret but a desire to make clear the grounds for some course, belief, or position.