uncoupling

1. gerundparticiplepresentpresent participle and gerund of uncouple

plural uncouplings

1. The act by which persons or things are uncoupled.

   This uncoupling done, Gimbert opened the regulator as Nightall climbed back onto the footplate, in order to pull the one burning wagon away from the rest of the bomb-laden train.

   2022 January 12, Benedict le Vay, “The heroes of Soham...”, in RAIL, number 948, page 42

   1 more example

   It is the first British yard in which every activity of hump marshalling, except for the driving of the hump locomotive and the uncoupling and coupling of wagons, is fully automatic or drastically simplified by modern aids.

   1960 June, “Talking of trains: The new Margam yard”, in Trains Illustrated, page 323