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Definition of perigee noun from the Oxford Advanced American Dictionary

 

perigee

 noun
noun
NAmE//ˈpɛrədʒi//
 
(astronomy)
 
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the point in the orbit of the moon, a planet, or other object in space when it is nearest the planet, for example the earth, around which it turns compare apogee
See the Oxford Advanced Learner's Dictionary entry: perigee