In grammar, when two words or phrases sit side by side and describe the same thing in different ways, like 'My friend Sarah' or 'John, the teacher.'
From Latin appositus (placed near), combining ad- (to) and ponere (to place). It entered English in the 16th century as a grammatical term.
Apposition is how language lets you add extra info without changing the sentence structure—'My cat Mittens' tells you both what the animal is and its name in one smooth flow. It's an elegant shortcut that makes writing tighter and clearer.
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