An archaic or poetic word meaning 'ago' or 'in the past,' often used in older literature to indicate something that happened a long time before.
From Middle English 'agone,' a past participle of 'agon' (to go). The word evolved from Old English 'agon' and the prefix 'a-' combined with 'gone,' literally meaning 'gone by' or 'passed away.' It survives primarily in archaic and poetic contexts.
Shakespeare loved 'agone'—you'll see it in his plays when characters talk about 'days agone' or 'years agone.' The word froze in time just as English was evolving, which is why it sounds so theatrical and distant to our modern ears.
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