I. ˈ ̷ ̷ˌ ̷ ̷ noun
1. : a roofed freight car with enclosed sides and usually with sliding doors in the sides for the conveyance of lading that must be protected from the weather or pilferage
2. boxcars plural but sometimes singular in construction : a throw of 12 in the game of craps
3. : a truck trailer resembling a railway boxcar in size and shape
II. adjective
: very large
billboards with boxcar letters