Couplings

Part of speech: noun

Definitions

1. A method or device utilized to join two or more components securely in mechanical or transport applications
2. Devices designed to join two mechanical parts together and allow for transfer of movement or force
3. Instruments used to link separate elements to form a unified assembly, often transmitting power or motion

Etymology: "Couplings" is simply the plural of "coupling", which comes from Middle English "couplynge", formed from "couple" with the suffix "-ing". The core idea is the older sense of "couple" as a joining or linking together: something that binds two things into one unit. Over time, that general sense of joining narrowed to the mechanical devices we recognise today, such as the hooks that link railway carriages or the fittings that connect shafts in machinery. Those devices perform the same basic job as the original word: they fasten two separate parts so they act as one.

Synonyms: connections, links, joins, attachments, associations