This meaning refers to a passage used in heating, cooling, and ventilation systems.
Warm air travels through the ducts.
Dust collected inside the ventilation duct.
This broader meaning refers to any enclosed channel used to carry materials, wires, or fluids.
The cable runs through a protective duct.
Water passed through the narrow duct.
In anatomy, a duct is a narrow tube carrying substances such as tears, bile, milk, or saliva.
The gland releases fluid through a duct.
The doctor examined the blocked tear duct.
