Meaning of COUPLING in English

n. 1 a a link connecting railway carriages etc. b a device for connecting parts of machinery. 2 Physics a connection between two systems, causing one to oscillate when the other does so. 3 Mus. a the arrangement of items on a gramophone record. b each such item.

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.