Reserve

To keep back; to retain; not to deliver, make over, or disclose.

Hence, to keep in store for future or special use; to withhold from present use for another purpose or time; to keep; to retain.

To make an exception of; to except.

The act of reserving, or keeping back; reservation.

That which is reserved, or kept back, as for future use.

That which is excepted; exception.

Restraint of freedom in words or actions; backwardness; caution in personal behavior.

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.

A body of troops 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.

Funds kept on hand to meet liabilities.

(medicine) potential capacity to respond in order to maintain vital functions

something kept back or saved for future use or a special purpose

formality and propriety of manner

arrange for and reserve (something for someone else) in advance; "reserve me a seat on a flight"; "The agent booked tickets to the show for the whole family"; "please hold a table at Maxim's"

armed forces that are not on active duty but can be called in an emergency