Added 10 October 2026 boxcar noun Categories: ThingsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about boxcar at Wordnik → Where our words come from → A freight car with roof and sliding doors in the sides. Origin From box + car. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: railcarcarcarloadwagoncarriagecaboosecovercoveredovercastbox-car Back to today's word