• Join


    • UK IPA: /ˈdʒɔɪn/
    • Rhymes: -ɔɪn


    From Old French joindre, from Latin iungō ("join, yoke"), from Proto-Indo-European *yeug- “to join, unite”.

    Full definition of join


    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.
      • 1898, Winston Churchill, The Celebrity Chapter 4, No matter how early I came down, I would find him on the veranda, smoking cigarettes, or otherwise his man would be there with a message to say that his master would shortly join me if I would kindly wait.
    4. To become a member of.
      Many children join a sports club.   Most politicians have joined a party.
      • 1918, W. B. Maxwell, The Mirror and the Lamp Chapter 22, In the autumn there was a row at some cement works about the unskilled labour men. A union had just been started for them and all but a few joined. One of these blacklegs was laid for by a picket and knocked out of time.
    5. (computing, databases, transitive) To produce an intersection of data in two or more database tables.
      By joining the Customer table on the Product table, we can show each customer's name alongside the products they have ordered.
    6. To unite in marriage.
      • John Wycliffe (1320-1384)he that joineth his virgin in matrimony
      • Bible, Matthew xix. 6What, therefore, God hath joined together, let not man put asunder.
    7. (obsolete, rare) To enjoin upon; to command.
    8. To accept, or engage in, as a contest.
      to join encounter, battle, or issue




    (plural joins)
    1. An intersection of piping or wiring; an interconnect.
    2. (computing, databases) An intersection of data in two or more database tables.
    3. (algebra) The lowest upper bound, an operation between pairs of elements in a lattice, denoted by the symbol ∨.


    • (lowest upper bound) meet
    © Wiktionary