Trousers \Trou"sers\, n. pl. [OF. trousses breeches worn by pages, from trousse, trosse, a bundle, a truss. See Truss, and cf. Trossers, Trouse.]

A garment worn by men and boys, extending from the waist to the knee or to the ankle, and covering each leg separately.

Source: Webster's Revised Unabridged Dictionary (1913)