reserve

hold back or set aside, especially for future use or contingency

• “they held back their applause in anticipation”

give or assign a share of money or time to a particular person or cause

• “I will earmark this money for your research”

obtain or arrange (for oneself) in advance

• “We managed to reserve a table at Maxim”

arrange for and reserve (something for someone else) in advance

• “reserve me a seat on a flight”
• “The agent booked tickets to the show for the whole family”
• “please hold a table at Maxim”

not engaged in military action

kept in reserve especially for emergency use

• “a reserve supply of food”
• “a spare tire”
• “spare parts”

formality and propriety of manner

something kept back or saved for future use or a special purpose

an athlete who plays only when another member of the team drops out

(medicine) potential capacity to respond in order to maintain vital functions

a district that is reserved for particular purpose

armed forces that are not on active duty but can be called in an emergency

the trait of being uncommunicative; not volunteering anything more than necessary