n. The state of agreeing or of being in accord.n. Union of opinions or sentiments; harmony in feeling; absence of dissension: as, a good agreement subsists among the members of the council.n. In grammar, correspondence of words in respect of number, gender, etc. See agree, v., I., 8. In logic, capability of being true together: said of terms.n. The act of coming to a mutual arrangement; a bargain, contract, covenant, or treaty: as, he made an agreement for the purchase of a house.n. Agreeable quality or circumstance; agreeableness: generally in the plural.