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swing by

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noun
  1. Aerospace. a trajectory that uses the gravitational field of one celestial body to alter the course of a spacecraft destined for another body.
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Origin of swing by

1960–65, Americanism; noun use of verb phrase swing by
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for swing by

swing by

verb
  1. (preposition) informal to go somewhere to pay a visit
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012