ice age
Americannoun
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a geologic period during which ice thickly covers vast masses of land.
astronomical phenomena related to the widespread glaciation of ice ages.
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Ice Age, the most recent of the earth’s many ice ages, occurring during the Pleistocene Epoch.
Our familiar continents were shaped quite differently before the Ice Age.
noun
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Any of several cold periods during which glaciers covered much of the Earth.
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Ice Age. The most recent glacial period, which occurred during the Pleistocene Epoch and ended about 10,000 years ago. During the Pleistocene Ice Age, great sheets of ice up to two miles thick covered most of Greenland, Canada, and the northern United States as well as northern Europe and Russia.
Etymology
Origin of ice age
First recorded in 1870–75
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.
Sir Keir Starmer's visit to China this week is the clearest sign yet the two countries are seeking to end the diplomatic "ice age" that has defined their relationship.
From BBC • Jan. 30, 2026
"At the end of the day, does it matter much if the start of the next ice age is 50, 100, or 200 thousand years into the future?"
From Science Daily • Dec. 21, 2025
This area contains a series of long, shallow grooves set within a landscape of deep valleys, scattered impact craters, and surface textures that point to a distant ice age on the Red Planet.
From Science Daily • Nov. 26, 2025
The explanation comes from the repeated advance and retreat of glaciers during a previous martian ice age.
From Science Daily • Nov. 26, 2025
During the last million years, there has been an ice age on average every 100,000 years.
From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari
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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.