ground squirrel grounds·quir·rel uncommon noun 1. small striped semiterrestrial eastern American squirrel with cheek pouches Synonymseastern chipmunkhackeestriped squirrelground squirrelTamias striatus 2. any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops Synonymsground squirrelgopherspermophile Related words Broader terms squirrel Narrower terms antelope squirrelmantled ground squirrelsuslikflickertailrock squirrelArctic ground squirrel Parts CitellusTamias WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.