Noun

(en noun)

A formal meal served in the middle of the day.

*{{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=2 citation , passage=Now that she had rested and had fed from the luncheon tray Mrs. Broome had just removed, she had reverted to her normal gaiety.  She looked cool in a grey tailored cotton dress with a terracotta scarf and shoes and her hair a black silk helmet.}}

(lb) A lump of food.

(lb) A portion of food taken at any time except at a regular meal; an informal or light repast.

*

*:At twilight in the summer there is never anybody to fear—man, woman, or cat—in the chambers and at that hour the mice come out. They do not eat parchment or foolscap or red tape, but they eat the luncheon crumbs.

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.