reservation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of reserving; a keeping back or withholding.
• noun A limiting qualification, condition, or exception.
• noun A doubt or misgiving.
• noun A tract of land set apart by the federal government for a special purpose, especially one for the use of a Native American people.
• noun An arrangement by which accommodations are secured in advance, as in a hotel or restaurant or on an airplane.

from The Century Dictionary.

• noun The act of reserving or keeping back; reserve; concealment or withholding from disclosure.
• noun Something withheld, either not expressed or disclosed, or not given up or brought forward.
• noun In the United States, a traet of the public land reserved for some special use, as for schools, the use of Indians, etc.: as, the Crow reservation. Also reserve.
• noun The state of being treasured up or kept in store; custody; safe keeping.
• noun In law:
• noun An express withholding of certain rights the surrender of which would otherwise follow or might be inferred from one's act (Mackeldey); a clause or part of an instrument by which something is reserved.
• noun Technically, in the law of conveyancing, a clause by which the grantor of real property reserves to himself, or himself and his successors in interest, some new thing to issue out of the thing granted, as distinguished from excepting a part of the thing itself.
• noun The right created by such a clause.
• noun Eccles.:
• noun The act or practice of retaining or preserving part of the consecrated eucharistic elements or species, especially that of bread, unconsumed for a shorter or longer period after the celebration of the sacrament.
• noun In the Roman Catholic Church, the act of the Pope in reserving to himself the right to nominate to certain benefices.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of reserving, or keeping back; concealment, or withholding from disclosure; reserve.
• noun Something withheld, either not expressed or disclosed, or not given up or brought forward.
• noun U.S. A tract of the public land reserved for some special use, as for schools, for the use of Indians, etc.
• noun The state of being reserved, or kept in store.
• noun A clause in an instrument by which some new thing is reserved out of the thing granted, and not in esse before.
• noun A proviso.
• noun The portion of the sacramental elements reserved for purposes of devotion and for the communion of the absent and sick.
• noun A term of canon law, which signifies that the pope reserves to himself appointment to certain benefices.
• noun an agreement to have some space, service or other acommodation, as at a hotel, a restaurant, or on a public transport system, held for one's future use; also, the record or receipt for such an agreement, or the contractual obligation to retain that accommodation.
• noun the withholding, or failing to disclose, something that affects a statement, promise, etc., and which, if disclosed, would materially change its import.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The act of reserving, withholding or keeping back.
• noun Something that is withheld or kept back.
• noun A limiting qualification (often used in the plural).
• noun US A tract of land set apart by the US government for the use of a Native American people; Indian reservation (compare Canadian reserve).
• noun An arrangement by which accommodation or transport arrangements are secured in advance.
• noun UK the area which separates opposing lanes of traffic on a divided motorway.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a district that is reserved for particular purpose
• noun the written record or promise of an arrangement by which accommodations are secured in advance
• noun an unstated doubt that prevents you from accepting something wholeheartedly
• noun something reserved in advance (as a hotel accommodation or a seat on a plane etc.)
• noun a statement that limits or restricts some claim
• noun the act of reserving (a place or passage) or engaging the services of (a person or group)
• noun the act of keeping back or setting aside for some future occasion