A person who reserves something

A city in Kansas. / A census-designated place in Louisiana. / A census-designated place in Montana. / A village, the county seat of Catron County, New Mexico. / A census-designated place in Wisconsin.

(comparable) Slow to reveal emotion or opinions. / (not comparable) Set aside for a particular person or purpose.

simple past tense and past participle of reserve

To keep back; to retain. / To keep in store for future or special use. / To book in advance; to make a reservation. / (obsolete) To make an exception of; to except.

The act of reserving or keeping back; reservation; exception. / Restraint of freedom in words or actions; backwardness; caution in personal behavior.

Stored and set aside for possible (future) use.

That may be reserved.

plural of reserver

Tending to reserve or keep.