coupling

/ˈkʌplɪŋ/
noun
  1. A device that connects two things together, especially parts of a machine or train cars.
    • The train's coupling snapped, causing the cars to separate.
    • He checked the coupling between the hose and the faucet for leaks.
    • The mechanic replaced the worn coupling on the engine shaft.
  2. The act of joining or connecting two things.
    • Successful coupling of the modules requires precise alignment.
    • The coupling of the two companies created a larger corporation.
    • The coupling of theory and practice is essential in this course.
  3. A relationship or connection between two people or groups.
    • Their coupling was the talk of the small town.
    • The novel explores the coupling of two very different characters.
    • In biology class, we studied the coupling of mating pairs in birds.
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