What is the meaning of Diner?

One who dines.

A dining car in a railroad train.

A typically small restaurant, usually modeled after a railroad dining car, that serves lower-class fare, normally having a counter with stools along one side and booths on the other, and often decorated in 50s and 60s pop culture themes and playing popular music from those decades.

A commemorative currency of Andorra, not legal tender, divided into 100 centims.

denary

money

denier

denarius

dinner, supper

post-1990 spelling of dîner

Alternative form of dyner

diner (a small and inexpensive type of restaurant)

Alternative form of dner

Source: wiktionary.org