noun

apologetics

reasoned defense of a belief, vindication

He is a professor of Christian apologetics.

He is a professor of Christian apologetics.

Her book is a work of feminist apologetics.

Her book is a work of feminist apologetics.

((of sth.)) apologetics of (a belief) He is a professor of Christian apologetics.

Synonyms: defense, justification, vindication

From Greek 'apologia' (a speech in one's own defense). It's about defending a belief, not saying sorry like in 'apologize'.

Don't confuse it with 'apologize'. Apologetics is the opposite: it's a strong, reasoned argument IN FAVOR of a position.

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