1. The act or process of discussing by breaking up, or dispersing, as a tumor, or the like. [archaic]
2. The act of discussing or exchanging reasons; examination by argument; debate; disputation; agitation.
The liberty of discussion is the great safeguard of all other liberties. --Macaulay.
Discussion of a problem or Discussion of an equation Math., the operation of assigning different reasonable values to the arbitrary quantities and interpreting the result.