1.the statement (oral or written) of an exchange of promises;
they had an agreement that they would not interfere in each other's business
2.compatibility of observations;
there was no agreement between theory and measurement
3.harmony of people's opinions or actions or characters;
the two parties were in agreement
4.the thing arranged or agreed to;
they made arrangements to meet in Chicago
5.the determination of grammatical inflection on the basis of word relations
6.the verbal act of agreeing