reservation (n.) Look up reservation at Dictionary.com
late 14c., "act of reserving," from Middle French reservation, from Late Latin reservationem (nominative reservatio), noun of action from past participle stem of Latin reservare (see reserve (n.)). U.S. Indian tribe sense is recorded from 1789, originally in reference to the Six Nations in New York State. Meaning "act or fact of engaging a room, a seat, etc." is from 1904, originally American English.