reservation
res.er.va.tion \.rez-*r-'va--sh*n\ n 1: an act of reserving something : as 1a1: the act or fact of a grantor's reserving some newly created thing out of the thing granted 1a2: the right or interest so reserved 1b: the setting of limiting conditions or withholding from complete exposit ion 1c: an engaging in advance of an accommodation or service; also : a promise, guarantee, or record of such engagement 2: something reserved : as 2a: a limiting condition 2b1: a tract of public land set aside (as for the use of Indians) 2b2: an area in which hunting is not permitted; esp : one set aside as a secure breeding place
Webster's English Dictionary