Meal is a noun. It describes food that is eaten at a certain time like breakfast.
The word meal is a noun. The plural form of meal is meals.
"Suppertime" is a noun. It refers to the evening meal or dinner.
"Different" is an adjective as it describes a noun, e.g. Your meal is quite different to mine.
Verb
A hot meal can ameliorate the discomforts of even the coldest day.
In this sentence, the word "connoisseur" is a noun.
Tasty is an adjective--a tasty meal.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath