n. An obsolete form of roaster.n. In the British and the United States regular armies, a list showing the turn or rotation of service or duty of those who relieve or succeed each other; specifically, a military list or register showing or fixing the rotation in which individuals, companies, or regiments are called into service.n. In Massachusetts and Connecticut, a list of the officers of a division, brigade, regiment, etc., containing, under several heads, their names, rank, corps, place of abode, etc. These are called division rosters, brigade rosters, regimental or battalion rosters. Bartlett.n. Hence, any roll, list, or register of names.