Definition of sire in English:


Line breaks: sire
Pronunciation: /sʌɪə


  • 1The male parent of an animal, especially a stallion or bull kept for breeding: the sire is one of the country’s top thoroughbred stallions
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    • Four Brahman and four Angus sires were rotated among breeding pastures in both forage systems each year.
    • 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.
  • 2 archaic A respectful form of address for someone of high social status, especially a king.
    More example sentences
    • We honestly did not know we had trespassed on your lands, sire.
  • 2.1A father or other male forebear.
    More example sentences
    • I never really knew my father, while the rest admired their noble sires.


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  • 1Be the male parent of (an animal): Castor twice sired two champions in a litter
    More example sentences
    • We conclude that the chicks were sired by extrapair males.
    • 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.
  • 1.1 literary (Of a person) be the father of: his father had just that measure of talent which so often sires a genius
    More example sentences
    • I have sired no offspring, created no universes, I cannot walk through walls and I've never been killed at Easter.
    • There will always be plenty of babies sired by dominant men.
    • About 40 percent of the babies were sired by someone other than the mother's mate.


Middle English (in sense 2 of the noun): from Old French, from an alteration of Latin senior (see senior). sense 1 of the noun dates from the early 16th century.

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