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[ven-tl-ey-shuh n] /ˌvɛn tlˈeɪ ʃən/
the act of ventilating.
the state of being ventilated.
facilities or equipment for providing ventilation.
Origin of ventilation
late Middle English
1425-75; late Middle English ventilacioun < Latin ventilātiōn- (stem of ventilātiō), equivalent to ventilāt(us) (see ventilate) + -iōn- -ion
Related forms
[ven-tl-uh-tawr-ee, -tohr-ee] /ˈvɛn tl əˌtɔr i, -ˌtoʊr i/ (Show IPA),
nonventilation, noun
overventilation, noun
reventilation, noun
underventilation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ventilation
  • Move fresh air into your home with proper ventilation.
  • ventilation is not exactly the first thing that comes to mind.
  • ventilation below ground is poor and deadly accidents occur almost daily.
  • The dimly lit room has low ceilings and poor ventilation.
  • The system relied on steam-driven trains, which made proper ventilation critical.
  • The only signs of life at the visitor centre are bats in the ventilation shafts.
  • But anywhere one uses pure ammonia caution, safety, and ventilation are coins of the realm.
  • Pulley-drawn cords make it easier to open for ventilation.
  • All this was discovered only when one employee escaped through a ventilation shaft.
  • The disease is easily preventable with the use of masks in mines and ventilation systems in factories.
British Dictionary definitions for ventilation


the act or process of ventilating or the state of being ventilated
an installation in a building that provides a supply of fresh air
Derived Forms
ventilative, adjective
ventilatory, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ventilation

mid-15c., from Latin ventilationem (nominative ventilatio) "an exposing to the air," noun of action from past participle stem of ventilare (see ventilate).

Online Etymology Dictionary, © 2010 Douglas Harper
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ventilation in Medicine

ventilation ven·ti·la·tion (věn'tl-ā'shən)

  1. The replacement of fresh air or gas for stale or noxious air or gas in a space.

  2. See respiration.

  3. Aeration or oxygenation, as of blood.

  4. The verbal expression of feelings or emotions in psychotherapy.

ven'ti·late' v.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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