imperceptible
Americanadjective
-
very slight, gradual, or subtle.
the imperceptible slope of the road.
-
not perceptible; not perceived by or affecting the senses.
- Synonyms:
- undetectable, unperceivable, hidden
noun
adjective
Other Word Forms
Etymology
Origin of imperceptible
From the Medieval Latin word imperceptibilis, dating back to 1520–30. See im- 2, perceptible
Explanation
If it's imperceptible, it's impossible to perceive with any of the senses. The world might be spinning, but it's imperceptible from your couch. Within the word imperceptible you see the word percept, which means "the object of your perception." Like impossible, the im in imperceptible means it cannot be perceived. Imperceptible is rarely used in the absolute sense of the word — it is usually paired with almost. Horton hears the Who but the tiny sounds of the Whos were almost imperceptible to everyone else.
Vocabulary lists containing imperceptible
The Crucible
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The Old Man and the Sea
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A Wrinkle in Time
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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.
A rise-and-fall tempo is necessary — even if, in the case of “Gail Daughtry,” the undulation is almost imperceptible.
From Salon ● Jul. 12, 2026
At first, the change is imperceptible but Nick notices that his sleepy village seems more vibrant, more populated with people.
From Los Angeles Times ● Jun. 19, 2026
The pressure creeps up gradually, almost imperceptible day to day, tormenting inhabitants with uncertainty as they watch their city close down around them.
From The Wall Street Journal ● Jun. 12, 2026
"The patterned nanostructures are imperceptible to the human eye, about the size of the wavelength of visible light," Dionne adds.
From Science Daily ● May 30, 2026
At first he was stiff and somewhat taken aback, but his own emotions quickly triumphed and he timidly encircled her with his arms and left an imperceptible kiss on her cheek.
From "The House of the Spirits: A Novel" by Isabel Allende
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
