wheel flat

English

Noun

wheel flat (plural wheel flats)

1. (rail transport) A flat spot on a railway wheel caused when a wheel, or both wheels on the same axle, in a moving train stop rotating.
   • 2020 October 7, “Network News: Severe wheel flats caused Welsh oil train derailment”, in Rail, page 14:

     Severe wheel flats caused by locking brakes led to the derailment of DB Cargo UK's 2152 Robeston-Theale oil train near Llangennech, in South Wales, on August 26.