reservation (
http://definr.com/reservation)
n 1: a district that is reserved for particular purpose [syn:
reserve]
2: a statement that limits or restricts some claim; "he
recommended her without any reservations" [syn:
qualification]
3: an unstated doubt that prevents you from accepting something
wholeheartedly [syn:
mental reservation,
arriere pensee]
4: the act of reserving (a place or passage) or engaging the
services of (a person or group): "wondered who had made
the booking" [syn:
booking]
5: the act of keeping back or setting aside for some future
occasion