perigee
Americannoun
noun
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The point nearest Earth's center in the orbit of the Moon or an artificial satellite.
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The point in an orbit that is nearest to the body being orbited.
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Compare apogee perihelion
Other Word Forms
- perigeal adjective
- perigean adjective
Etymology
Origin of perigee
First recorded in 1585–95; from French perigée, from New Latin perigēum, perigaeum, from Greek perígeion (sēmeîon) “perigee,” literally “boundary, limit (surrounding the earth),” equivalent to neuter of perígeios “surrounding the earth,” ( peri- peri- + -geios, adjective derivative of gaîa, gê “the earth”)
Compare meaning
How does perigee compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
The perigee is the point in the orbit of an object circling the Earth when that object is closest to the Earth. The best time to observe the moon is when the moon reaches its perigee. The Greek ancestor of the word perigee was originally used by Ptolemy, a Roman scientist and astrologer who lived almost 2,000 years ago. The opposite of perigee is apogee. A perigee is measured from the center of the earth to the center of the orbiting object. When the moon is at its perigee, it can appear up to 14 percent larger than when it is at its apogee, but you probably can't tell the difference with the naked eye.
Vocabulary lists containing perigee
Over The Moon: Planetary Vocabulary
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Spinnin' Around
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This Week in Words: January 27 - February 2, 2018
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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 Moon has an elliptical orbit and when it is at its closest point to the Earth we say that it is in perigee.
From BBC • Sep. 12, 2025
When the perigee coincides with a full Moon it is known as a supermoon.
From BBC • Sep. 12, 2025
When it is at its closest we call it perigee.
From BBC • Nov. 14, 2024
In that position, known as perigee, the moon exerts its strongest gravitational pull, and the difference between high and low tides is the greatest.
From Los Angeles Times • Feb. 9, 2024
She said the moon was in perigee that night, the closest it got to the planet of humans and dogs.
From "100 Sideways Miles" by Andrew 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.
