What does agreement mean?
The definition of agreement
A*gree”ment, n.
Etym: [Cf. F. agrément.]

1 State of agreeing; harmony of opinion, statement, action, or character; concurrence; concord; conformity; as, a good agreement subsists among the members of the council. What agreement hath the temple of God with idols 2 Cor. vi. 16. Expansion and duration have this further agreement. Locke.
2 (Gram.)
Concord or correspondence of one word with another in gender, number, case, or person.
3 (Law)

(a) A concurrence in an engagement that something shall be done or omitted; an exchange of promises; mutual understanding, arrangement, or stipulation; a contract.
(b) The language, oral or written, embodying reciprocal promises. Abbott. Brande & C.
Synonyms
— Bargain; contract; compact; stipulation.