Definitions:

1. A samll, energetic breed of dog originally developed in England for fox hunting, by Reverend John Russell in the 19th century. NOUN
   • Known for their hunting instincts, Jack Russells were originally bred to chase foxes out of their dens.
2. A type of small terrier bred to chase animals from holes, with short white hair and brown and black marks. NOUN
   • Training a Jack Russell requires patience and creativity to keep up with their sharp minds.

Synonyms:

• fox terrier