Reservation (noun)

1. An arrangement to have something such as a room or seat kept for someone in advance.
2. An area of land set aside for a particular purpose, such as a national park.
3. A doubt or reservation about something.

Origin:

Late middle english: from old french, or from latin reservatio(n-), from reservare "keep back", from re- "back" + servare "keep".

Examples:

1. I made a reservation at the restaurant for 7 o'clock.
2. We went to a reservation to see the native americans.
3. He had some reservations about the plan.
4. The hotel was fully booked but we managed to get a reservation.
5. The reservation of the land for the park was a good idea.