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WordNet



noun


(1)   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"
(2)   The shape or manner in which things come together and a connection is made

verb


(3)   Make contact or come together
"The two roads join here"
(4)   Cause to become joined or linked
"Join these two parts so that they fit together"
(5)   Become part of; become a member of a group or organization
"He joined the Communist Party as a young man"
(6)   Come into the company of
"She joined him for a drink"
(7)   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"
Wiktonary



Etymology


From , from , from Proto-Indo-European *yeug- “to join, unite”.

Verb



  1. To combine more than one item into one; to put together.
    The plumber joined the two ends of the broken pipe.
    We joined our efforts to get an even better result.
  2. To come together; to meet.
    Parallel lines never join.
    These two rivers join in about 80 miles.
  3. To come into the company of.
    I will join you watching the football game as soon as I have finished my work.
  4. To become a member of.
    Many children join a sports club.
    Most politicians have joined a party.

Noun



  1. An intersection of piping or wiring; an interconnect.
  2. An intersection of data in two or more database tables.
  3. the lowest upper bound, an operation between pairs of elements in a lattice, denoted by the symbol \vee (mnemonic: an angular J).