Relating to someone or something or an adjective directly following the noun it modifies: "The Tea Party, which is an appositive movement of conservatives in the United States, has been gaining more influence in political meetings."

Words, or phrases, that refer to the same person or thing and have the same relationship to other sentence elements: "In the sentence, 'His friend, Martin, was a good student' the name 'Martin' is in apposition to 'His friend'."