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Any of various very massive, large, and bright stars, such as Betelgeuse or Rigel, having a luminosity that is thousands of times greater than that of the sun. When a supergiant collapses into a supernova, it may result in either a neutron star or a black hole.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
su•per•gi•ant(ˈsu pərˌdʒaɪ ənt)
a very bright, very large star, hundreds of times larger than the sun.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A star that is larger, brighter, and more massive than a giant star. Supergiants, such as Betelgeuse or Rigel, are thousands of times brighter than the sun. See more at star.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||supergiant - an extremely bright star of very large diameter and low density|
star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
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