waist
Americannoun
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the part of the body in humans between the ribs and the hips, usually the narrowest part of the torso.
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the part of a garment covering this part of the body.
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the part of a one-piece garment covering the body from the neck or shoulders more or less to the waistline, especially this part of a woman's or child's garment.
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a child's undergarment to which other articles of apparel may be attached.
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the part of an object, especially a central or middle part, that resembles or is analogous to the human waist.
the waist of a violin.
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Nautical. the central part of a ship; that part of the deck between the forecastle and the quarterdeck.
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the constricted portion of the abdomen of certain insects, as a wasp.
noun
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anatomy the constricted part of the trunk between the ribs and hips
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the part of a garment covering the waist
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the middle part of an object that resembles the waist in narrowness or position
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the middle part of a ship
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Also called: centre section. the middle section of an aircraft fuselage
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the constriction between the thorax and abdomen in wasps and similar insects
Other Word Forms
Etymology
Origin of waist
1300–50; Middle English wast, apocopated variant of wastum, Old English wæstm growth, form, figure; akin to wax 2
Explanation
On a human, the waist is the narrowing between the ribs and the hips –- though for many of us, "narrowing" may actually be "expanding." Waist can also refer to the part of a piece of clothing that covers the waist — like the waist (or waistline) of a dress or a jacket. Most likely you know these most common definitions of waist, but did you know that a waist can also be the narrow part of a shoe, or of a violin? Don’t confuse the definition of waist with waste, though the words have the same pronunciation.
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.
The control group lost only 0.6 kg and trimmed waist size by 0.3 cm.
From Science Daily • May 19, 2026
Unlike when I tried to borrow from the boys section, the board shorts weren’t comically long or baggy or cut straight across the waist.
From Los Angeles Times • May 15, 2026
It was a clear non-footballing action, too, with the Portugal international having both arms around the waist of Rohl and no interest in challenging for the ball.
From BBC • May 5, 2026
And singer Rose, a multiple Grammy nominee this year for "APT," her banger collab with Bruno Mars, wore a chic strapless black dress with a high slit and an outsized bird brooch at her waist.
From Barron's • May 5, 2026
Strapped around his narrow waist was his favorite tool belt.
From "Storm Runners" by Roland Smith
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.
