join

Sense 1 noun

the shape or manner in which things come together and a connection is made

Sense 2 verb

become part of; become a member of a group or organization

He joined the Communist Party as a young man

Sense 3 noun

a set containing all and only the members of two or more given sets

let C be the union of the sets A and B

Sense 4 verb

cause to become joined or linked

join these two parts so that they fit together

Sense 5 verb

come into the company of

She joined him for a drink

Sense 6 verb

make contact or come together

The two roads join here

Sense 7 verb

be or become joined or united or linked

The two streets connect to become a highway