Dissociation Dis*so`ci*a"tion (?; 106), n. [L. dissociatio: cf. F. dissociation.] 1. The act of dissociating or disuniting; a state of separation; disunion. [1913 Webster]

It will add infinitely dissociation, distraction, and confusion of these confederate republics. --Burke. [1913 Webster]

2. (Chem.) The process by which a compound body breaks up into simpler constituents; -- said particularly of the action of heat on gaseous or volatile substances; as, the dissociation of the sulphur molecules; the dissociation of ammonium chloride into hydrochloric acid and ammonia. [1913 Webster]

The Collaborative International Dictionary of English. 2000.