Definition of British warm in English:

British warm

noun

  • A short, thick military overcoat or duffel coat.

    warm
    • ‘We were issued with British warms, Spine Pads, neck Protectors & goggles, evidently we were to have a ‘place in the sun’.’
    • ‘The original British warm takes its fabric and styling from the greatcoats worn by officers during the First World War.’
    • ‘In London yesterday straight-backed gentlemen in British warms and rows of medals saluted as wreaths were laid at the war memorial unveiled at Hyde Park Corner.’