Noun

Eating dinner as a social function.

* 1869 , The XIX Century (volume 1, page 6)

For my own part I preferred to remain with the ship, and I am now glad that I did so, for the welcome we received at Havana; the cheering crowds upon the quay; the friends we met and made; the dinings in and dinings out

Entertaining someone to dinner.

Noun

(wikipedia diner) (en noun)

One who dines, an eater.

*{{quote-book, year=1922, author=(Ben Travers)

, chapter=5, title= A Cuckoo in the Nest , passage=The most rapid and most seductive transition in all human nature is that which attends the palliation of a ravenous appetite.

* (Calvin Trillin) (1935-)

When it comes to Chinese food I have always operated under the policy that the less known about the preparation the better. A wise diner who is invited to visit the kitchen replies by saying, as politely as possible, that he has a pressing engagement elsewhere.

A dining car in a railroad train.

* Richard Gutman

The diner is everybody's kitchen.

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 pop culture themes and playing popular music from those decades.