adjective
Definition: Referring to two people or things together; used to indicate that something applies to both of them.
Example: Both of my friends are coming to the party.
conjunction
Definition: Used to refer to two people or things together, indicating that both are included or involved.
Example: Both the teacher and the student were happy with the results.
pronoun
Definition: This word refers to two people or things together, indicating that both are included or considered.
Example: Both of us are going to the party tonight.