1. an arrangement to have something (such as a table at a restaurant or a hotel room) held for your use at a particular time
2. a feeling of doubt or uncertainty about something
3. an area of land set aside for a particular purpose, especially for Native American tribes

Examples

• I made a reservation at the restaurant for 7 PM.
• Do you have a hotel reservation for tonight?
• She had some reservations about accepting the job offer.
• He expressed his reservations about the new policy.
• The family lives on a Native American reservation.
• The nature reservation protects endangered wildlife.
• She accepted the proposal without reservation.