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[hyoo-mid-uh-fahy or, often, yoo-] /hyuˈmɪd əˌfaɪ or, often, yu-/
verb (used with object), humidified, humidifying.
to make humid.
1880-85; humid + -ify
Related forms
humidification, noun
unhumidified, adjective
unhumidifying, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for humidify
  • To humidify or not to humidify: that is the question.
  • Alternatively, humidify the air using heat recovered from the return air stream.
  • Central humidifiers are built into heating and air-conditioning systems, and humidify the whole house.
  • Remember, moisture from cooking and bathing helps humidify your house, making it more comfortable in the winter.
  • In the summer, air conditioning can de-humidify indoor space.
  • They evaporate water to cool and humidify the air around them.
British Dictionary definitions for humidify


verb -fies, -fying, -fied
(transitive) to make (air) humid or damp
Derived Forms
humidification, noun
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 humidify

1884; see humid + -fy. Related: Humidified; humidifying. Earlier was humify (1650s).

Online Etymology Dictionary, © 2010 Douglas Harper
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