/'kʌplɪŋ; `kʌplɪŋ/
n
1 (a) [U] act of joining 连结.
(b) [C, U] (arch or rhet 古或修辞) (act of) sexual intercourse 性交; 云雨.
2 [C] link connecting two parts, esp two railway carriages or other vehicles 连接器; （尤指列车等的）车钩, 挂钩.

n[C]
something that connects two things together, especially two vehicles
when two things are joined or connected
= combination
　an attractive coupling of two Slavonic Dances
formal an act of having sex