per·​spi·​ra·​tion | \ ˌpər-spə-ˈrā-shən How to pronounce perspiration (audio) \

Definition of perspiration

1 : the action or process of perspiring
2 : a saline fluid secreted by the sweat glands : sweat

Examples of perspiration in a Sentence

She wiped the perspiration from her forehead.

Recent Examples on the Web

Symptoms include anxiety, heat sensitivity, increased perspiration, and weight loss, among others. Selena Barrientos, Good Housekeeping, "Wendy Williams to Spend a "Significant Time" Hospitalized Due to Graves' Disease," 18 Jan. 2019 When perspiration and bacteria get trapped in the pores and cause infection due to tight or sweaty clothing. Carolyn Twersky, Seventeen, "Say "See Ya Bye" to Body Acne with These Helpful Tips," 21 Mar. 2017 The Aircomfort back system allows for better airflow, which means less perspiration and a warmer back. Timothy Dahl, Popular Mechanics, "Hike With Your Kids Using These Child Carrier Backpacks," 28 Nov. 2018 Choose breathable fleece to inhibit the accumulation of perspiration during exertion. Deb Acord, Popular Mechanics, "7 Tips to Survive Cold-Weather Camping," 14 Dec. 2015 Technically, white clothing was supposed to be both a little more breathable and less hot than other colors; presumably, players would sweat less in their whites — and their perspiration would be not be quite so obvious, thanks to the light color. Raisa Bruner, Time, "Why Wimbledon Players Have to Wear All White," 2 July 2018 Their perspiration has become the inspiration for new generations of students including those at Liberty High School who are studying space flight and rocketry. David Taylor, Houston Chronicle, "Rocketry students at LHS shooting for the sky," 7 July 2018 On hot days, the body can lose large amounts of water through perspiration. J. Harry Jones,, "Popular trails closed due to heat concerns," 5 July 2018 The opposite is true when the relative humidity decreases because the rate of perspiration increases. Cincinnati Enquirer,, "Not a dry heat: Heat index in 100s," 18 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'perspiration.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of perspiration

1583, in the meaning defined at sense 1

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Statistics for perspiration

Last Updated

11 Mar 2019

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Time Traveler for perspiration

The first known use of perspiration was in 1583

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English Language Learners Definition of perspiration

somewhat formal
: the clear liquid that forms on your skin when you are hot or nervous
: the act or process of perspiring


per·​spi·​ra·​tion | \ ˌpər-spə-ˈrā-shən How to pronounce perspiration (audio) \

Kids Definition of perspiration

1 : the act or process of perspiring
2 : salty liquid given off from skin glands


per·​spi·​ra·​tion | \ ˌpər-spə-ˈrā-shən How to pronounce perspiration (audio) \

Medical Definition of perspiration

1 : the act or process of perspiring
2 : a saline fluid that is secreted by the sweat glands, that consists chiefly of water containing sodium chloride and other salts, nitrogenous substances (as urea), carbon dioxide, and other solutes, and that serves both as a means of excretion and as a regulator of body temperature through the cooling effect of its evaporation

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Comments on perspiration

What made you want to look up perspiration? Please tell us where you read or heard it (including the quote, if possible).


an enemy or opponent

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