What does "nutritious" (as in "nutritious meal") generally implies? Mostly something with enough (or even a lot of) calories? or more something that has a good variety of the nutrients necessary for a proper, healthy diet?
PS: Adding some of the research I did before asking the question:
I am asking this question because I read for instance in the British dictionary on dictionary.com:
Nutritious: adjective 1. nourishing, sometimes to a high degree
where "nourishing" can be clicked on, with the result:
Nourishing: promoting or sustaining life, growth, or strength
These definitions (or others I can find) are compatible with both the above interpretations ( enough (or a lot of) calories, and  a variety of nutrients). However, I am asking this question because I implicitly learned from usage (as a non-native speaker) only the first meaning, while a friend (also a non-native speaker) insists that only the second meaning is correct. Since the definitions I can find are somewhat vague, like the above ones (e.g. they are compatible with the idea that nutritious can even refer to things like sleep, which "promotes or sustains life,…", which is, as far as I know, not the case), I can't know for sure which, or if both the interpretations above are implied by "nutritious".