The Roman's main meal of the day was called dinner. The Latin for dinner is "cena".
dinner
They didn't. The Romans ate three meals a day just as we do, and their main meal of the day was in the evening just as ours.
Dinner in the evening.
For the same reason we have only one main meal. For the Romans it was dinner, just as it is for most of us. They had lighter meals or snacks for both breakfast and lunch, sometimes away from home, so dinner was when the family got together and had their main meal.
rice and fish
breakfast
Lunch
Lunch is the midday meal it can also be called "luncheon". Sometimes if your main meal of the day is taken at midday, you could also use the word "dinner" but dinner would also apply if your main meal was at night. Thus "dinner" is the main meal of the day whenever it is taken.
If you are referring to time of day, it would be the mid day meal (almuerzo). If you are referring to the type of food served at most meals, it would be soup (sopa).
It is the main meal of the day, called comida (As in desayuno = breakfast, comida = dinner, cena = supper).
In some parts of the United States it is called dinner. In others, where the midday meal is the main meal of the day called dinner, the evening meal is called supper.