Definition of "boxcar"

boxcar

noun
plural boxcars
1. (rail transport, US) An enclosed railway goods wagon, typically with a sliding door.
  Quotations
  The locomotive pulled one single car, a dilapidated boxcar missing numerous planks in its walls.
  2016, Colson Whitehead, The Underground Railroad, Fleet (2017), page 83
verb
third-person singular simple present boxcars, present participle boxcarring, simple past and past participle boxcarred
1. (mathematics, transitive) To reduce to a boxcar function.