Definition of stallion in US English:



  • An uncastrated adult male horse.

    • ‘I was pleased to have several readers tell me they enjoyed reading my piece about the heavy horse stallions and the routes they followed in days gone by.’
    • ‘In the meantime, the Jockey Club has typed stallions and mares in order to build an initial database.’
    • ‘Linear social hierarchies exist in herds with stallions being dominant.’
    • ‘Darley Stud has boosted the stud fees of three of its stallions for the 2004 breeding season.’
    • ‘Outside the breeding season the mares and stallions are kept separate otherwise the stallions fight to the death to win mating rights over the mares.’
    • ‘Nine of the 13 mares cataloged at Keeneland will be sold in foal to Shadwell-owned stallions.’
    • ‘From the start the bloodlines of Australian horses were strongly Arab with increasing influence from thoroughbred stallions.’
    • ‘Maronic plans to breed their own mares to primarily New York stallions.’
    • ‘Maria was 15 years old and bought Riley from a man in the city who bred and sold stallions and mares.’
    • ‘The current roster has more than 50 stallions breeding on five continents.’
    • ‘The horses can trace their ancestry back to the imported Arabian stallions of the 18th century and many of their riders wore period costumes.’
    • ‘Dell thought the stallion should be retired and his foals could take over where he left off.’
    • ‘Any colt or filly who wins a Classic is likely to be much sought after as a stallion or brood mare.’
    • ‘The main advantage is that the best stallion for your mare can be used irrespective of location.’
    • ‘Sadler's Wells, one of the most successful ever stallions, was bred at Sangster's Swettenham Stud.’
    • ‘If the mares are not in foal to Kentucky stallions, it is difficult to get a really top price.’
    • ‘Reproductive maturity is reached only at two to three years in mares and four to five years in stallions.’
    • ‘The biggest risk is that almost the entire population is the product of as few as three stallions from the founder group.’
    • ‘They bought a lot of very high-priced stallions and brood mares and so on from all around the world.’
    • ‘The mare must foal in British Columbia and be bred back to a stallion standing in the province.’


Middle English: from an Anglo-Norman French variant of Old French estalon, from a derivative of a Germanic base shared by stall.