Definition of horse chestnut in English:

horse chestnut


  • 1A deciduous tree with large leaves of five leaflets, conspicuous sticky winter buds, and upright conical clusters of white, pink, or red flowers. It bears nuts (conkers) enclosed in a fleshy case.

    • ‘Along the trail, visitors can enjoy specimens such as the Indian horse chestnut, dawn redwood, autumn oaks and oriental hawthorns.’
    • ‘Staff at Kennet had already been alerted to the imminent removal of a large horse chestnut tree beside the staff car park, which is said to be diseased and unsafe.’
    • ‘They are all native species such as oak, horse chestnut and flowering cherry and have replaced those lost over the past few years, including one that was hit by a car and another that was blown down in the January gales.’
    • ‘Many trees, such as lime, sycamore, horse chestnut and willow provide excellent bee forage.’
    • ‘Extracts from garlic, horse chestnut, lavender, ragwort, rosemary, plantain and the liverwort Marchantia were all unpalatable.’
    1. 1.1
      another term for conker
      • ‘Depicting a horse chestnut, the sculpture symbolizes the fruits of a rural community and its potential for growth, energy and community.’
      • ‘The horse chestnuts are not closely related to true chestnuts or chinquapins, and the resemblance of their fruits is coincidental.’


Late 16th century: translating (now obsolete) botanical Latin Castanea equina; its fruit is said to have been an Eastern remedy for chest diseases in horses.


horse chestnut