A terrier of a small working breed with short legs.
- ‘The Jack Russell Terrier is a small terrier with origins in fox hunting.’
- ‘The Jack Russell is a happy, bold, energetic dog; they are extremely loyal, intelligent and assertive. Their greatest attribute is their working ability, closely followed by their excellent qualities as a companion.’
- ‘He was walking to the shops when he was set upon by around six dogs, including a Staffordshire Bull Terrier, a Jack Russell and a German Shepherd Labrador cross.’
- ‘I looked down to see a small Jack Russell terrier ecstatically running in circles around my legs, tail wagging wildly.’
- ‘Scrappers like the foot-tall Jack Russell terrier can hold their own, too, but dogs smaller than that don't have the legs or the hearts to keep up.’
Early 20th century: named after John ( Jack) Russell (1795–1883), an English clergyman famed in fox-hunting circles as a breeder of such terriers.