1. (noun) any of several breeds of usually large powerful dogs bred to work as draft animals and guard and guide dogs

• boxer
• bull mastiff
• bulldog
• english bulldog
• eskimo dog
• husky
• great dane
• guard dog
• watchdog
• guide dog
• hearing dog
• mastiff
• police dog
• saint bernard
• st bernard
• seizure-alert dog
• sennenhunde
• sheep dog
• sheepdog
• shepherd dog
• sled dog
• sledge dog

1. (noun) any of several breeds of usually large powerful dogs bred to work as draft animals and guard and guide dogs

• canis familiaris
• dog
• domestic dog