Definition of: apposition

(ap′ə·zish′ən) noun
1. Gram. The placing of one substantive beside another to add to or explain the first, as in John, president of the class.
2. A placing or being in immediate connection; application; addition.
3. Biol. Growth or increase by juxtaposition, as of tissue.
—ap′po·si′tion·al adjective
—ap′po·si′tion·al·ly adverb