a. The natural phenomenon of attraction between physical objects with mass or energy; the weakest of the four fundamental forces of nature. Also called gravity.
b. The act or process of moving under the influence of this attraction.
c. See gravitational interaction.
2. A movement toward a source of attraction: the gravitation of the middle classes to the suburbs.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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