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to become a member of a group or organization
He joined the gym to improve his fitness.
He became a member of the gym to exercise.
Often used with prepositions like 'in', 'with', or 'to'.
to connect or combine with something else
The two companies decided to join forces.
The two companies merged their operations.
Can be used literally or metaphorically.
Note the preposition that follows 'join'—it changes the meaning slightly.
'Join in' is for activities, 'join with' is for people, and 'join to' is for goals.
From Middle English joinen, from Old French joindre, from Latin jungere (to join).
Can be used in both literal and figurative contexts. Often followed by prepositions like 'in', 'with', or 'to'.