[Ramrod]

din·ner n.

The chief meal of the day, eaten in the evening or at midday.
A banquet or formal meal in honor of a person or event.
The food prepared for either of these meals.
A full-course meal served at a fixed price; table d'hÃÃâ€*’´te.


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[Middle English diner, morning meal, from Old French disner, diner, to dine, morning meal. See dine.]
Word History: Eating foods such as pizza and ice cream for breakfast may be justified etymologically. In Middle English dinner meant †œbreakfast,Ãƚ¢Ã¢â€šÂ¬Ã‚à ‚ÂÂ� as did the Old French word disner, or diner, which was the source of our word. The Old French word came from the Vulgar Latin word *disinre, meaning †œto break one's fast; that is, to eat one's first meal,ââ‚ƚ¬Ã‚ÂÂÂ� a notion also contained in our word breakfast. The Vulgar Latin word was derived from an earlier word, *disiinre, the Latin elements of which are dis-, denoting reversal, and iinium, †œfast.⠀ Â� Middle English diner not only meant †œbreakfastà¢Ã¢â€šÂ¬Ã‚Ã⠀šÃ‚Â� but, echoing usage of the Old French word diner, more commonly meant †œthe first big meal of the day, usually eaten between 9 A.M. and noon.ââ‚ƚ¬Ã‚ÂÂÂ� Customs change, however, and over the years we have let the chief meal become the last meal of the day, by which time we have broken our fast more than once.

I use breakfast>lunch>dinner but you can see from the above dictionary.com entry why we are a little confused about the subject


edit........I see that bootboy et al got there first