reservation

noun

1. (countable, uncountable)The act of reserving, withholding or keeping back.

   “The committee authorised the reservation of funds.”

2. (countable, uncountable)The act of reserving, withholding or keeping back.
3. (countable, uncountable)The act of reserving, withholding or keeping back.
4. (countable, uncountable)Something that is withheld or kept back.
5. (countable, in-plural, often, uncountable)A limiting qualification regarding certainty or risk; a doubt or concern.

   “I have reservations about your intentions.”

   “I have some reservations about cosigning a loan for him.”

   “Apart from the problemette with the punchy bits, I've got only one reservation with the game and that's that the tie-in element is a bit shaky to say the least.”

6. (US, countable, uncountable)A tract of land set apart by the US government for the use of a Native American people, such as the Hopi Reservation or the Navajo Nation's territory.
7. (countable, uncountable)An arrangement by which accommodation or transport arrangements are secured in advance.

   “I have a hotel reservation in the name of Mr Smith.”

   “I haven't booked, so I don't have a clue as to whether the service will be busy or not. Supposedly, reservations are compulsory, but I want to find out what would happen if you just turn up.”

8. (UK, countable, uncountable)The area which separates opposing lanes of traffic on a divided motorway or dual carriageway.

   “A vehicle crashed through the central reservation into the path of oncoming traffic.”

   “A three-lane motorway can be up to (or even more than) 35 metres wide, with a hard shoulder on either side and a central reservation.”

9. (India, countable, uncountable)The setting aside of a certain percentage of vacancies in government institutions for members of backward and underrepresented communities (defined primarily by caste and tribe).
10. (countable, uncountable)A power of an overseeing authority to suspend legislation in the jurisdiction being overseen pending the approval of a higher authority. Such as a provincial/state governor reserving a bill passed by the state/provincial legislature from assent, pending approval of the federal government; or a federal bill passed by federal parliament being reserved by the viceroy pending approval by the crown.