Open English Wordnet
Nouns
(n)union, sum, joina set containing all and only the members of two or more given sets“let C be the union of the sets A and B” Verbs
(v)join, fall in, get togetherbecome part of; become a member of a group or organization“He joined the Communist Party as a young man” (v)joincause to become joined or linked“join these two parts so that they fit together” (v)joincome into the company of“She joined him for a drink” (v)join, conjoinmake contact or come together“The two roads join here” (v)connect, link, link up, join, unitebe 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”