self-service

noun

1. the serving of oneself in a restaurant, shop, gas station, or other facility, without the aid of a waiter, clerk, attendant, etc.

adjective

2. noting or pertaining to a cafeteria, grocery, store, etc., designed for the patron or customer to gather food or merchandise from a display or display shelves without the aid of attendants and pay at a cashier’s desk upon leaving.
3. of, for, or pertaining to something designed to be used or enjoyed without the aid of an attendant: self-service banking; self-service elevators.

adjective

1. of or denoting a shop, restaurant, petrol station, etc, where the customer serves himself

noun

2. the practice of serving oneself, as in a shop, etc

adj.1919, in reference to grocery stores, from self- + service (n.1).