breakfast vs meal

breakfast and meal both are nouns.

Word	Noun	Adjective	Verb	Adverb
breakfast	Yes	No	Yes	No
meal	Yes	No	No	No

As nouns, meal is a hypernym of breakfast; that is, meal is a word with a broader meaning than breakfast:

Other hypernyms of breakfast include repast.

breakfast (noun)	meal (noun)
the first meal of the day (usually in the morning)	the food served and eaten at one time
	coarsely ground foodstuff; especially seeds of various cereal grasses or pulse
	any of the occasions for eating food that occur by custom or habit at more or less fixed times

breakfast (verb)	meal (verb)
eat an early morning meal
provide breakfast for