boxcar

box +‎ car

boxcar (plural boxcars)

1. (rail transport, US) An enclosed railway goods wagon, typically with a sliding door.
   • 2016, Colson Whitehead, The Underground Railroad, Fleet (2017), page 83:

     The locomotive pulled one single car, a dilapidated boxcar missing numerous planks in its walls.

   Synonyms: (formal in the UK) covered goods wagon, (British and Australian English:) goods van, box van, van

• box car
• box-car

• boxcar function

• flatcar

boxcar (third-person singular simple present boxcars, present participle boxcarring, simple past and past participle boxcarred)

1. (mathematics, transitive) To reduce to a boxcar function.