Definition of duct in English:


Line breaks: duct
Pronunciation: /dʌkt


  • 1A tube or passageway in a building or machine for air, liquid, cables, etc.: leading the air through ducts in the floor ventilation ducts
    More example sentences
    • The foot-deep wall also holds a mirrored medicine cabinet and conceals a maze of plumbing, air ducts, and ventilation equipment.
    • Gas had built up and seeped through pipes, drains and cable ducts into the bungalows.
    • The doctor conceded that during his 16 years of occupancy, the air ducts of the building have not been cleaned.
  • 1.1(In the body) a vessel for conveying lymph or glandular secretions such as tears or bile.
    More example sentences
    • It is filled with nerves, blood vessels and lymph ducts which run through it and connect it to your body, making it part of you.
    • The stroma consists of fatty tissue and ligaments surrounding the ducts and lobules, blood vessels and lymphatic vessels.
    • Using this procedure, physicians can view these organs and inject dye into the bile and pancreatic ducts to make them visible by x-ray.
  • 1.2(In a plant) a vessel for conveying water, sap, or air.
    More example sentences
    • Insects cut veins in plants with arborescent resin canals or in plants with laticiferous ducts that do not reticulate.
    • To illustrate this point it was found that in stems and petioles of several species of the Umbelliferae, such as celery, the antiserum only labelled a layer of cells that line a system of ducts which ramify throughout the plant body.


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  • Convey through a duct: a ventilation system that must be ducted through the wall
    More example sentences
    • Units are best located in garages or basements or even under the stairs, provided the exhaust air is ducted to the outside, otherwise the motor could overheat.
    • Even worse, some of the air may not be ducted at all.
    • Warm, stale air is then ducted out through the ceiling.



More example sentences
  • The most commonly used classification of invasive breast cancers divides them into ductal and lobular types.
  • The most common type of male breast cancer is invasive ductal carcinoma.
  • Injuries range from minor contusions or lacerations to major ductal injuries and transections that result in the formation of pseudocysts.


mid 17th century (in the sense 'course' or 'direction'): from Latin ductus 'leading, aqueduct' from duct- 'led', from the verb ducere.

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