To place side by side; to position one thing next to another, especially in grammar where a word or phrase is placed beside another for clarification.
From Latin apponere (ad- 'to' + ponere 'to place'). Entered English in formal grammatical use, related to the noun apposition.
When you write 'my sister Emma' where 'Emma' is apposed next to 'sister,' you're using a grammatical technique that adds information without extra words—it's efficient and appears constantly in good writing.
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