The obvious answer is "a meal which is hot", but when I see this phrase it often seems as if there is a deeper meaning present, as if there is some major distinction between hot meals and other meals (cold meals? lukewarm meals?).
E.g. (from the Wikipedia article "Lunch"):
In Finland, lunch is a full hot meal, ...
In Romania, lunch (prânz in Romanian) is the main hot meal of the day.
These usages seem to use "hot meal" as carrying a substantial quality, that the temperature of the food involved is somehow associated with its quantity or ability to satiate hunger. Is there some such association?
What does "hot meal" mean?