tundras From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA flat and treeless Arctic biome. Related wordsSynonymscirquestarnstaigasubarcticptarmiganschiffchaffsnowybarrensscrublandslappishbunchgrassphalaropesarcticspruce grouseheatherysnowscape References Wiktionary — tundras Wikipedia — tundras