Meaning of the word "word class" in English

What does "word class" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

word class

US /wɜrd klæs/
UK /wɜːd klɑːs/

Noun

a category of words (such as noun, verb, adjective, or adverb) sharing a common set of grammatical properties; a part of speech

Example:
Understanding the different word classes is fundamental to learning grammar.
Nouns, verbs, and adjectives are common word classes.