What is the meaning of Fast_food?

Restaurant food that is served quickly, often standardized and pre-prepared.

A type of food that is quickly made, but of low nutritional value; junk food. (Can we verify this sense?)

Anything standardized, quickly available, and inexpensive, often, of low value.

fast food (type of meal that is often pre-prepared and served quickly)

a fast food restaurant

snack bar

fast food (type of meal that is often pre-prepared and served quickly)

fast food (type of meal that is often pre-prepared and served quickly)

Source: wiktionary.org