Discussion \Dis*cus"sion\, n. [L. discussio a shaking, examination, discussion: cf. F. discussion.]

1. The act or process of discussing by breaking up, or dispersing, as a tumor, or the like.

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 an equation (Math.), the operation of assigning different reasonable values to the arbitrary quantities and interpreting the result. --Math. Dict.

Source: Webster's Revised Unabridged Dictionary (1913)