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Synonyms

humid

American  
[hyoo-mid, yoo-] / ˈhyu mɪd, ˈyu- /

adjective

  1. containing a high amount of water or water vapor; noticeably moist.

    humid air;

    a humid climate.

    Synonyms:
    wet, dank

humid British  
/ ˈhjuːmɪd /

adjective

  1. moist; damp

    a humid day

"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

Usage

What does humid mean? Humid is used to describe air that is full of water vapor.Humid is most commonly applied to weather or the general climate of a place, especially when the temperature is hot.The noun form of humid is humidity.Example: Summertime in Florida is almost unbearably humid.

Related Words

See damp.

Other Word Forms

  • humidly adverb
  • humidness noun
  • subhumid adjective
  • unhumid adjective

Etymology

Origin of humid

First recorded in 1375–1425; late Middle English, from Latin (h)ūmidus, equivalent to (h)ūm(ēre) “to be moist” + -idus -id 4

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But on hot, humid days, she struggled to keep up with target paces set by the app, which doesn’t take weather into account.

From The Wall Street Journal • Feb. 8, 2026

“It’s uncomfortably hot and humid almost all year round, expensive and there’s construction everywhere,” she said.

From MarketWatch • Feb. 4, 2026

These light-colored spots stand out sharply against the surrounding terrain and suggest that some regions of Mars once hosted humid environments with frequent rainfall, similar to tropical areas on Earth.

From Science Daily • Jan. 27, 2026

Clare says bright lounge areas, with lots of light, are ideal for monsteras, while warm and humid kitchens suit peace lilies.

From BBC • Jan. 14, 2026

It was only mid-February, but the weather had turned suddenly warm and humid.

From "Out of Darkness" by Ashley Hope Pérez