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  1. cou·pling
    IPA[ˈkəp(ə)liNG]
  2. noun

    • 1. a device for connecting parts of machinery:

      undo the couplings so you can lift the pump out
    • 2. a fitting on the end of a railroad vehicle for connecting it to another:

      a train with couplings of the continental pattern
    • 3. the pairing of two items:

      the coupling of coaching and personal training this coupling of two of the greatest works of Haydn
    • 4. an interaction between two electrical components by electromagnetic induction, electrostatic charge, or optical link:

      mutually inductive coupling
    • 5. the action of mating or having sexual intercourse.

  3. Variation

    • n.: noun: coupling, plural noun: couplings

    • noun

      a device for connecting parts of machinery:

      a fitting on the end of a railway vehicle for connecting it to another:

    • noun

      a measure of the strength of interaction between two particles, or between a particle and a field.
    • noun

      a rod which couples the driving wheels of a locomotive, enabling them to act as a unit.
    • noun

      a female screw with threads at both ends for joining lengths of piping or rods.
    • noun

      a constant representing the strength of the interaction between a particle and a field.
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