/hook"up'/ , n.
1. an act or instance of hooking up.
2. an assembly and connection of parts, components, or apparatus into a circuit, network, machine, or system.
3. the circuit, network, machine, or system so formed.
4. 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.
5. Informal. an association, alliance, or cooperative effort: A closer hookup of Caribbean nations would be good for international trade.
[ 1900-05, Amer.; n. use of v. phrase hook up ]