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ice ages

Cultural  

  1. Periods in the history of the Earth when large glaciers covered much of the surface of the continents.

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The last ice age ended less than twenty thousand years ago.

Scientists believe that there will be more ice ages in the future, caused by tiny changes in the Earth's orbit and rotation.

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.