Meaning

noun the sister of your father or mother; the wife of your uncle

originFrom Middle English aunte, from Anglo-Norman aunte, from Old French ante, from Latin amita (“father's sister”). Displaced native Middle English modrie (“aunt”) (from Old English mōdriġe (“maternal aunt”); compare Old English faþu, faþe (“paternal aunt”)). The digraph ⟨au⟩ representing /æ ~ ɑː/ instead of the expected /ɔː/ is irregular, and has not been conclusively explained (compare launch,…

Etymology from Wiktionary, CC BY-SA 3.0