dead space
Americannoun
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space, as in a room, urban area, etc., that is not being used or cannot be used.
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Physiology. the volume of air in those parts of the respiratory tract in which there is no exchange of oxygen and carbon dioxide, namely in the nose, trachea, and bronchi, as opposed to the bronchioles.
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Medicine/Medical. in a syringe, the space between the bottom of the plunger and the syringe's tapered tip, in which unused product remains after an injection.
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Photography. the area in a picture or image that does not draw the viewer's eye because it is not dominated by the subject and its position, gaze, or movement.
Other Word Forms
Noun Inflected Forms
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.
Those particles can interfere with satellites, spacecraft, and other space based technologies near Earth, making these solar events important for scientists who study space weather.
From Science Daily • May 23, 2026
Many of the people I’ve met who study space have very similar origin stories to one another.
From Slate • Feb. 7, 2025
And astronomers warn the increasing number of satellites in orbit is making it harder to study space.
From BBC • Jan. 29, 2025
The son of a single immigrant mother from El Salvador, he had no home Wi-Fi or working laptop for stretches at a time or a study space in the family’s cramped apartment.
From Los Angeles Times • Apr. 25, 2023
Ever since she was a kid, Sarah Kane has wanted to study space.
From Scientific American • Jan. 5, 2023
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.
