reserve

finance: funds kept on hand

known unexploited natural resource

military: body of troops in the rear of an army

restraint of freedom in words or actions

sports: reserve player

that which is reserved, or kept back, as for future use

the act of reserving, or keeping back; reservation

tract of land for Aboriginal peoples

tract of land reserved for Aboriginal people

tract of land reserved, or set apart, for a particular purpose

to book in advance

to keep back; to retain

to keep in store for future or special use