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permeate

American  
[pur-mee-eyt] / ˈpɜr miˌeɪt /

verb (used with object)

permeates, present (3rd person singular) permeated, past participle, past permeating present participle
  1. to pass into or through every part of.

    Bright sunshine permeated the room.

  2. to penetrate through the pores, interstices, etc., of.

  3. to be diffused through; pervade; saturate.

    Cynicism permeated his report.


verb (used without object)

permeates, present (3rd person singular) permeated, past participle, past permeating present participle
  1. to become diffused; penetrate.

permeate British  
/ ˈpɜːmɪˌeɪt /

verb

  1. to penetrate or pervade (a substance, area, etc)

    a lovely smell permeated the room

  2. to pass through or cause to pass through by osmosis or diffusion

    to permeate a membrane

"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 permeate mean? Permeate means to penetrate, pass through, and often become widespread throughout something. Similar words are pervade and saturate. Permeate can be used both in the context of the physical spread of something within a space and in more figurative ways. Dye permeates fabric. A smell can permeate a room. An idea can permeate someone’s mind. The adjective permeable means capable of being permeated, especially by liquids or gases, as in Permeable surfaces should be sealed to prevent leaks. The adjective permeating describes things that have permeated or have the ability to permeate, as in Social media has become a permeating aspect of our lives. Example: This material has a special coating that won’t allow anything to permeate its surface.

Other Word Forms

Derived Forms

Etymology

Origin of permeate

First recorded in 1650–60; from Latin permeātus, past participle of permeāre “to pass through”; see origin at per-, meatus

Explanation

When you live in a big city like New York, you know all too well how the smells of spices and cooking meats can permeate a hallway, easily passing through those thin apartment doors to make your mouth water. The verb permeate literally means to "pass through." It's often used to describe smells or liquids that not only pass through, but also spread to fill an entire area. When you bake cookies, you'll notice that the rich, sweet smell of those cookies isn't confined just to your oven — it permeates the entire kitchen and even the whole house. In science class, you might have learned about a permeable membrane — a thin material that is porous enough to let liquids or gases to pass through.

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Vocabulary lists containing permeate

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.

"And in other ways, sometimes something can permeate that you really didn't expect."

From BBC • May 22, 2026

Our Journal correspondent Yoko Kubota, who recently left the country after eight years, reflects on how a distrust of foreigners has come to permeate everyday life in China.

From The Wall Street Journal • May 12, 2026

Throughout their journey, all four astronauts emphasized how unified Earth looks from afar -- a takeaway they hoped would permeate public consciousness.

From Barron's • Apr. 11, 2026

These fields permeate every cubic centimeter of space and time.

From Science Daily • Mar. 10, 2026

Some of the defects and malformations in tomorrow’s children, grimly anticipated by the Office of Vital Statistics, will almost certainly be caused by these chemicals that permeate our outer and inner worlds.

From "Silent Spring" by Rachel Carson

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