Definition of sire in English:



  • 1The male parent of an animal, especially a stallion or bull kept for breeding.

    • ‘Large, high-gaining sires produce calves with large birth weights.’
    • ‘If the sire was determined to be Angus or Brangus, then conception date was determined by subtracting 283 d from calving date.’
    • ‘It is well known that if a trait is heritable, the easiest and most practical way to change the trait in a herd of cattle is through selection of the sire.’
    • ‘Sequencing was done on eight bull sires of Norwegian dairy cattle using Dye Terminator chemistry.’
    • ‘Second-generation hybrids were generated from four parental animals: two sires and two dams.’
    • ‘Scientists are looking for genetic variation within the breed that would allow producers to choose sires based on the beef tenderness of their progeny and other characteristics.’
    • ‘Four Brahman and four Angus sires were rotated among breeding pastures in both forage systems each year.’
    • ‘In the US, stallion fees for new sires have come down significantly.’
    • ‘Many dairy farmers use natural service sires to overcome problems associated with estrous detection.’
    • ‘Mott's family started selecting sires for lower birth weights years ago.’
    • ‘Quadratic is the sire of three current stallions led by Home At Last, who stands at Nuckols Farm in Kentucky for $2,500.’
    • ‘With his fine breeding on his sire's side, this bull should bring in a lot of money.’
    • ‘There were disproportionate numbers of female or male births consistently produced by some sires.’
    • ‘As is typical of cow herds, the sires were not in contact with their calves.’
    • ‘When few or no ancestors are common to the sire and dam, the breeding is known as an outcross.’
    • ‘Larger territorial males were more likely to sire the entire clutch or share paternity with fewer additional sires than smaller territorial males.’
  • 2archaic A respectful form of address for someone of high social status, especially a king.

    • ‘We honestly did not know we had trespassed on your lands, sire.’
    1. 2.1A father or other male forebear.
      • ‘I never really knew my father, while the rest admired their noble sires.’


  • 1 Be the male parent of (an animal)

    • ‘Saithor, an 11-year-old son of Storm Bird, has sired nine foals from one American crop of racing age.’
    • ‘Similar to a paternity suit, the owners must prove they do not know which horse sired the foal.’
    • ‘We conclude that the chicks were sired by extrapair males.’
    • ‘He has sired ten foals of racing age and ten yearlings in his first two crops.’
    • ‘The probability of dominant males siring infants decreased when the number of simultaneously tumescent females increased.’
    • ‘Information on mating and spacing patterns was obtained by mapping offspring sired by individual males.’
    • ‘In order to obtain the permit, the Gallaghers appealed to the Jockey Club and proved they do not know who sired the filly.’
    • ‘He never showed much interest in the number of departmental female elephants around and never sired a calf.’
    • ‘The heifer calves were from crossbred cows sired by Eimousin bulls.’
    • ‘We collected DNA samples from 811 offspring from 45 litters that were collectively sired by 48 males.’
    • ‘Certainly, mating systems in which a male is able to sire many offspring with many different females will cause natural selection to favor different traits than one in which a male is limited to one female.’
    • ‘The higher the concentration of dioxin in the serum of exposed males, the less likely they were to sire a male child.’
    • ‘Two of the control males had most likely sired one and two offspring, respectively, in one nest each.’
    • ‘Calves were sired by Artificial Insemination or in single sire mating pastures.’
    • ‘Males are expected to provide less care to offspring sired by other males.’
    • ‘At the age of 12 months, a healthy male deer can sire 2 to 3 calves from a female in nine months.’
    • ‘Some males sire many offspring, and many males sire no offspring, a dynamic that intensifies male-male competition.’
    • ‘He has sired four foals out in two crops of racing age, with five yearlings in his third crop.’
    • ‘About 20 percent of males mature when only 2 years old and spend their lives siring offspring in other males' nests.’
    • ‘Not only social mating success but also the ability of males to sire offspring is related to the expression of secondary sexual characters.’
    1. 1.1literary (of a person) be the father of.
      • ‘During those 130 years Adam sired children by beings other than Eve.’
      • ‘I have sired no offspring, created no universes, I cannot walk through walls and I've never been killed at Easter.’
      • ‘In biological terms, men can sire hundreds of children in their lives, but this biological ability is limited by the fact that no one woman can keep pace.’
      • ‘About 40 percent of the babies were sired by someone other than the mother's mate.’
      • ‘There will always be plenty of babies sired by dominant men.’
      father, sire, engender, generate, spawn, create, give life to, bring into being, bring into the world, have
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Middle English ( sire): from Old French, from an alteration of Latin senior (see senior). sire dates from the early 16th century.