Noun | 1. | ![]() terrier - any of several usually small short-bodied breeds originally trained to hunt animals living underground Staffordshire bull terrier, Staffordshire bullterrier - English breed of strong stocky dog having a broad skull and smooth coat American pit bull terrier, American Staffordshire terrier, pit bull terrier, Staffordshire terrier - American breed of muscular terriers with a short close-lying stiff coat |