say it: BAHK-skahrz
boxcars is a noun meaning "(usually plural) an expression used when two dice are thrown and both come up showing six spots". It carries one recorded sense.
(usually plural) an expression used when two dice are thrown and both come up showing six spots
plural
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for boxcars come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.