Association

The act of associating, or state of being associated; union; connection, whether of persons of things.

Mental connection, or that which is mentally linked or associated with a thing.

Union of persons in a company or society for some particular purpose; as, the American Association for the Advancement of Science; a benevolent association. Specifically, as among the Congregationalists, a society, consisting of a number of ministers, generally the pastors of neighboring churches, united for promoting the interests of religion and the harmony of the churches.

a formal organization of people or groups of people; "he joined the Modern Language Association"

(chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding

the process of bringing ideas or events together in memory or imagination; "conditioning is a form of learning by association"