- (rail transport, UK, uncountable) The operation of short-distance freight trains, e.g. between goods yards.
- 1962 October, G. Freeman Allen, “The New Look in Scotland's Northern Division—II”, in Modern Railways, page 267:
- The provision of the new yard permitted closure of four existing installations, between which there was a great deal of trip working.
- (countable) A freight train involved in such operation.