The term "reservation" has several meanings, depending on its context. Generally speaking, a reservation refers to keeping something aside for someone or something else. Here are some common definitions and uses of the word:
1) In the context of travel and accommodation, a reservation is an arrangement made in advance for lodging, seats, or table at a restaurant, hotel, airline, etc., for a specific date and time.
2) Reservations can also refer to special privileges or rights granted to certain groups or individuals based on their race, ethnicity, gender, age, religion, or other factors. These reservations are often made in the interest of promoting equality and social justice.
3) In a more general sense, reservation refers to holding something back, keeping it in reserve for future use or circumstances. For example, one might make a reservation about committing to a decision until they have all the necessary information.