water wagon is a noun meaning "a wagon that carries water (as for troops or work gangs or to sprinkle down dusty dirt roads in the summertime)". It carries one recorded sense.
a wagon that carries water (as for troops or work gangs or to sprinkle down dusty dirt roads in the summertime)
Definitions, synonyms and semantic relations for water wagon come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.