adjective
Definition: Referring to every one of a group separately; used to talk about individual items or people in a group.
Example: Each student must submit their assignment by Friday.
adverb
Definition: This word is used to refer to every one of two or more people or things, considered separately.
Example: Each student must submit their assignment by Friday.
pronoun
Definition: Every single one in a group, considered separately.
Example: Each student in the class has a different project topic.