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Local Group

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noun Astronomy.
  1. the group of galaxies, at least 25 of which are known, that includes the Milky Way.
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Origin of Local Group

First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for local group

Local Group

noun
  1. astronomy the cluster of galaxies to which our galaxy and the Andromeda Galaxy belong
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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
local group in Science

Local Group

  1. A group of more than 30 galaxies that includes 2 large spiral galaxies-the Milky Way and Andromeda-as well as numerous smaller galaxies, many of which are dwarfs. The Local Group has a diameter of approximately 10 million light-years, with its gravitational center located between our galaxy and the Andromeda galaxy. It is part of a larger grouping known as the Virgo supercluster.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.