Coupling

adj. connecting, linking, joining

n. mating; joining, bringing together; connecting part (Machinery)

v. connect, join, link; marry; mate, engage in sexual intercourse

This article describes a mechanical connection between two things. For other meanings, see Coupling (disambiguation). A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. Couplings do not normally allow disconnection of shafts during operation, however there does exist  torque limiting couplings which can slip or disconnect when some torque limit is exceeded.
See more at Wikipedia.org...

Noun
1. a connection (like a clamp or vise) between two things so they move together
(synonym) yoke
(hypernym) connection, connexion, connector, connecter, connective
(derivation) match, mate, couple, pair, twin
2. a mechanical device that serves to connect the ends of adjacent objects
(synonym) coupler
(hypernym) mechanical device
(hyponym) clevis
(derivation) couple, couple on, couple up
3. the act of pairing a male and female for reproductive purposes; "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"
(synonym) mating, pairing, conjugation, union, sexual union
(hypernym) sexual activity, sexual practice, sex, sex activity
(hyponym) assortative mating
(derivation) copulate, mate, pair, couple

Noun
1. a small indefinite number; "he's coming for a couple of days"
(hypernym) small indefinite quantity, small indefinite amount
2. a pair of people who live together; "a married couple from Chicago"
(synonym) mates, match
(hypernym) family, family unit
(hyponym) power couple
(derivation) copulate, mate, pair
3. a pair who associate with one another; "the engaged couple"; "an inseparable twosome"
(synonym) twosome, duo, duet
(hypernym) pair
(hyponym) same-sex marriage
(derivation) pair, pair off, partner off
4. two items of the same kind
(synonym) pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad
(hypernym) two, 2, II, deuce
(hyponym) doubleton
(derivation) match, mate, pair, twin
5. something joined by two equal and opposite forces that act along parallel lines
(hypernym) unit, building block
(hyponym) dipole
(part-meronym) moment
Verb
1. bring two objects, ideas, or people together; "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"
(synonym) match, mate, pair, twin
(hypernym) join, bring together
(hyponym) mismate
(verb-group) match
(derivation) pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad
2. link together; "can we couple these proposals?"
(synonym) couple on, couple up
(antonym) uncouple, decouple
(hypernym) attach
(derivation) coupling, coupler
3. form a pair or pairs; "The two old friends paired off"
(synonym) pair, pair off, partner off
(hypernym) unite, unify
(derivation) twosome, duo, duet
4. make love; "Birds mate in the Spring"
(synonym) copulate, mate, pair
(hypernym) join, conjoin
(hyponym) nick
(derivation) mates, match

(p. pr. & vb. n.)
of Couple
  

(n.)
The act of bringing or coming together; connection; sexual union.
  

(n.)
A device or contrivance which serves to couple or connect adjacent parts or objects; as, a belt coupling, which connects the ends of a belt; a car coupling, which connects the cars in a train; a shaft coupling, which connects the ends of shafts.
  

The desirable or undesirable transfer of energy from one medium, such as a metallic wire or an optical fiber, to another like medium, including fortuitous transfer. (188 ) Note: Examples of coupling include capacitive (electrostatic) coupling, inductive (magnetic) coupling, conducted (resistive or hard-wire) coupling, and fiber-optic coupling.