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See more synonyms for coupler on Thesaurus.com
  1. a person or thing that couples or links together.
  2. Machinery. a rod or link transmitting force and motion between a rotating part and a rotating or oscillating part.
  3. Also called coupling. Railroads. a device for joining pieces of rolling stock.
  4. a device in an organ or harpsichord for connecting keys, manuals, or a manual and pedals, so that they are played together when one is played.
  5. Electricity. a device for transferring electrical energy from one circuit to another, as a transformer that joins parts of a radio apparatus together by induction.
  6. (in color photography) a chemical that reacts with the developer to produce one of the colors in a print or transparency.
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Origin of coupler

First recorded in 1545–55; couple + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for coupler

network, relationship, hookup, element, contact, channel, tie, association, pairing, knot, nexus, hitch, seam, in, ring, section, ligature, connective, member, interconnection

Examples from the Web for coupler

Historical Examples of coupler

  • He's been working on what amounts almost to the Coupler Theory for ten years.

    The Galaxy Primes

    Edward Elmer Smith

  • Note that there is no drawbar and that the coupler is merely bolted to the beams.

  • About 11:30 the boys returned with the tug and new bolts for our coupler.

    The houseboat book

    William F. Waugh

  • Why, I remember when a coupler Turks 'elped in the good work one mornin'.

  • Guess I'll haul her off a coupler points an' try the whistle again.

    Captain Scraggs

    Peter B. Kyne

British Dictionary definitions for coupler


  1. a link or rod transmitting power between two rotating mechanisms or a rotating part and a reciprocating part
  2. music a device on an organ or harpsichord connecting two keys, two manuals, etc, so that both may be played at once
  3. electronics a device, such as a transformer, used to couple two or more electrical circuits
  4. US and Canadian a device for connecting railway cars or trucks togetherAlso called (in eg Britain): coupling
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012