boxcar

Etymology

box + car

noun

  1. (rail transport, US) An enclosed railway goods wagon, typically with a sliding door.
    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

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

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