RAC stands for “Reservation Against Cancellation.” In the context of the Indian railway system, it refers to a type of ticket that is issued when all the seats in a particular class of train are fully booked. When a passenger holds a RAC ticket, it means that they are guaranteed a seat, but they may have to share it with another passenger.
RAC tickets are issued to passengers on a first-come, first-served basis, and the number of RAC tickets available is limited. When a passenger with a RAC ticket boards the train, they are assigned a specific seat, but they may have to share it with another passenger who also holds an RAC ticket. If a passenger with a confirmed ticket does not board the train, the RAC passenger is then allocated a confirmed seat.
RAC ticket holders are also given priority over waitlisted passengers when it comes to getting a confirmed seat. For example, if a passenger with a confirmed ticket does not board the train, the first RAC passenger will be given the seat, followed by the first waitlisted passenger, and so on.
In summary, RAC ticket is a type of Indian railway system ticket, which ensures a seat on the train, but it may not be a confirmed seat and the passenger may have to share the seat with another RAC ticket holder. If a confirmed passenger does not board the train, then the RAC passenger will be given the confirmed seat.