1
: a bodily tube or vessel especially when carrying the secretion of a gland
2
a
: a pipe, tube, or channel that conveys a substance
b
: a pipe or tubular runway for carrying an electric power line, telephone cables, or other conductors
3
: a tube or elongated cavity (such as a xylem vessel) in plant tissue
4
: a layer (as in the atmosphere or the ocean) which occurs under usually abnormal conditions and in which radio or sound waves are confined to a restricted path
ducted; ducting; ducts
1
: to enclose in a duct
2
: to convey (something, such as a gas) through a duct
also
: to propagate (something, such as radio waves) through a duct
Synonyms
Examples of duct in a Sentence
Noun
air ducts to provide ventilation
Recent Examples on the Web
Lauren Wicks, Southern Living, 6 Oct. 2024
Breast density measures the amount of fatty tissue compared to other tissue that makes up muscles and milk ducts, called fibroglandular tissue.
—Adrianna Rodriguez, USA TODAY, 14 Sep. 2024
Kaitlyn McInnis, Better Homes & Gardens, 13 Apr. 2023
The board approved the purchase of items needed for educating during the coronavirus, including $200,000 for HVAC ultraviolet disinfectant emitters for A /C units and duct microbial control and $150,000 for COVID-19 testing that provides results in about 24-36 hours.
—Savannah Mehrtens, Houston Chronicle, 12 Aug. 2020
See all Example Sentences for duct 
Noun
Clean Out Air Vents And Ducts Our home’s ventilation is only as good as the air vents and ducts are clean.
—Lauren Wicks, Southern Living, 6 Oct. 2024
Breast density measures the amount of fatty tissue compared to other tissue that makes up muscles and milk ducts, called fibroglandular tissue.
—Adrianna Rodriguez, USA TODAY, 14 Sep. 2024
Verb
Duct size and compatibility: Matching the exhaust fan's duct size and type with your existing ductwork or ventilation system can reduce the need for additional ductwork modifications or adapters.
—Kaitlyn McInnis, Better Homes & Gardens, 13 Apr. 2023
The board approved the purchase of items needed for educating during the coronavirus, including $200,000 for HVAC ultraviolet disinfectant emitters for A /C units and duct microbial control and $150,000 for COVID-19 testing that provides results in about 24-36 hours.
—Savannah Mehrtens, Houston Chronicle, 12 Aug. 2020
See all Example Sentences for duct
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'duct.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near duct
Cite this Entry
“Duct.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/duct. Accessed 5 Nov. 2024.
Copy CitationMedical Definition
duct
noun
: a bodily tube or vessel especially when carrying the secretion of a gland
Love words? Need even more definitions?
Merriam-Webster unabridged
Share