What is the meaning of coupling?

noun

• A connection (like a clamp or vise) between two things so they move together.
  • synonyms: yoke
• A mechanical device that serves to connect the ends of adjacent objects.
  • synonyms: coupler
• The act of pairing a male and female for reproductive purposes.
  • usage: "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"
  • synonyms: mating, pairing, conjugation, union, sexual union

verb

• Bring two objects, ideas, or people together.
  • usage: "This fact is coupled to the other one"; "Matchmaker, can you match my daughter with a nice young man"; "The student was paired with a partner for collaboration on the project"
  • synonyms: match, mate, couple, pair, twin
• Link together.
  • usage: "can we couple these proposals"
  • synonyms: couple, couple on, couple up
• Form a pair or pairs.
  • usage: "The two old friends paired off"
  • synonyms: pair, pair off, partner off, couple
• Engage in sexual intercourse.
  • usage: "Birds mate in the Spring"
  • synonyms: copulate, mate, pair, couple