an act or instance of hooking up.
an assembly and connection of parts, components, or apparatus into a circuit, network, machine, or system.
the circuit, network, machine, or system so formed.
a device or connection, as a plug, hose, or pipe, for conveying electricity, a water supply, etc., from a source to a user: Some campsites have electrical hookups for trailers.
Informal. an association, alliance, or cooperative effort: A closer hookup of Caribbean nations would be good for international trade.

1900–05, Americanism; noun use of verb phrase hook up

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Dictionary.com's 21st Century Lexicon
Main Entry:  hookup
Part of Speech:  n
Definition:  See hook-up
Dictionary.com's 21st Century Lexicon
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Example sentences
They require only an electrical hookup and chilled water from the outside.
He has given demonstrations of his playful hookup to middle- and high-school
Water hookup in place and house and septic plans included.
Water and electric hookup are also available when necessary.
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