Refers to a tube or channel for conveying air, gas, cables, etc., commonly used in technical and everyday contexts.
I cleaned the air conditioner duct.
Many ducts run through the building.
Construction began to install ducting in the ceiling.
The duct got clogged with dust and air stopped flowing.
The wiring runs through the duct and connects to each room.
ダクト is typically counted with 本, the counter for long, tube-like objects.
Borrowed from English 'duct'.