noun
The definition of a duct is a tube, channel or passage that gas or liquid move through.
An example of a duct is the piping through which air conditioning enters into an office.
duct

- a tube, channel, or canal through which a gas or liquid moves
- a tube in the body for the passage of excretions or secretions: a tear duct, bile duct
- a conducting tubule in plant tissues, esp. one containing resin, latex, etc.
- a pipe or conduit through which wires or cables are run, air is circulated or exhausted, etc.
Origin of duct
Medieval Latin ducta, conduit from Classical Latin ductus, a leading, conducting, past participle of ducere, to lead from Indo-European base an unverified form deuk-, to pull from source tow, tug, Classical Latin dux, leaderduct

noun
- An often enclosed passage or channel for conveying a substance, especially a liquid or gas.
- Anatomy A tubular bodily canal or passage, especially one for carrying a glandular secretion: a tear duct.
- A tube or pipe for enclosing electrical cables or wires.
transitive verb
duct·ed, duct·ing, ducts- To channel through a duct: duct the moist air away.
- To supply with ducts.
Origin of duct
Latin ductus act of leading from past participle of dūcere to lead ; see deuk- in Indo-European roots.Related Forms:
- duct′al
adjective
- duct′less
adjective
duct

Noun
(plural ducts)
- A pipe, tube or canal which carries air or liquid from one place to another.
- heating and air-conditioning ducts
- An enclosure or channel for electrical cable runs.
Verb
(third-person singular simple present ducts, present participle ducting, simple past and past participle ducted)
- To channel something through a duct (series of ducts)
duct - Computer Definition

A tube, pipe, channel, or conduit through which a gas or liquid flows or through which cables or wires are run. See also duct tape.