"joins" in the noun sense
1. articulation, join, joint, juncture, junction
the shape or manner in which things come together and a connection is made
2. union, sum, join
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"
"joins" in the verb sense
1. join, fall in, get together
become part of become a member of a group or organization
"He joined the Communist Party as a young man"
cause to become joined or linked
"join these two parts so that they fit together"
come into the company of
"She joined him for a drink"
4. join, conjoin
make contact or come together
"The two roads join here"
5. connect, link, link up, join, unite
be or become joined or united or linked
"The two streets connect to become a highway"
"Our paths joined"
"The travelers linked up again at the airport"
Source: WordNet® (An amazing lexical database of English)
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