n A tract of land reserved, or set apart, for a particular purpose; as, the Connecticut Reserve in Ohio, originally set apart for the school fund of Connecticut; the Clergy Reserves in Canada, for the support of the clergy.
n (Canada) A tract of land set apart for the use of an Aboriginalgroup; Indian reserve (compare US (term|reservation).)
n (military) A body of troops kept in the rear of an army drawn up for battle, reserved to support the other lines as occasion may require; a force or body of troops kept for an exigency.
n (finance) Funds kept on hand to meet planned or unplanned financial requirements.
n (sports) A member of a team who does not participate from the start of the game, but can be used to replace tired or injured team-mates.