nullahs From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA stream-bed, ravine, or other watercourse; a drain for rain or floodwater. Related wordsSynonymscanalschannelsdrainssewersintersectedravinesriversstreamsdrydeepnumeroussmallseveralarearroyoscanyons References Wiktionary — nullahs Wikipedia — nullahs