The hotel offers comprehensive meals for guests staying overnight. (The hotel provides free three meals for overnight guests. ) "meals" in this sentence refers to breakfast, lunch and dinner, which is one of the services provided by the hotel for guests.
My favorite meal of the day is breakfast because I love pancakes and bacon. (My favorite meal of the day is breakfast, because I like pancakes and bacon. ) the "meal" in this sentence refers to breakfast, which refers to a specific meal time.
We have our meals together as a family, but some times we eat separately due to busy schedules. (We usually eat together as a family, but sometimes we eat separately due to busy schedules. ) The "meals" in this sentence refers to breakfast, lunch and dinner, which is an aspect of family life.