red giant

  1. a star in an intermediate stage of evolution, characterized by a large volume, low surface temperature, and reddish hue.

Origin of red giant

First recorded in 1915–20

Words Nearby red giant Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use red giant in a sentence

  • The red giant had the advantage in height, if not in weight; the black giant in strength of muscle, if not in suppleness of limbs.

    Burl | Morrison Heady
  • There was the fleck of white high up near the top of the red giant, its white-dwarf companion in transit.

    Earthsmith | Milton Lesser
  • Roger de Conde spoke no English, and yet she had plainly heard English words upon this man's lips as he addressed the red giant.

    The Outlaw of Torn | Edgar Rice Burroughs
  • Nevertheless, he brought the car to anchor without a second's hesitation, drawing up alongside the humiliated red giant.

    My Friend the Chauffeur | C. N. Williamson and A. M. Williamson
  • But the question as to how the red giant stars were formed has received less satisfactory and precise answers.

British Dictionary definitions for red giant

red giant

  1. a giant star towards the end of its life, with a relatively low temperature of 2000–4000 K, that emits red light

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

Scientific definitions for red giant

red giant

  1. A giant star that has a relatively low surface temperature, giving it a reddish or orange hue. Red giants are non-main-sequence stars positioned in the upper right of the Hertzsprung-Russell diagram. They are not massive stars but rather late, expanded stages of lower-mass main-sequence stars that have exhausted the hydrogen in their core and are fusing their remaining hydrogen into helium in a luminous outer shell. The Sun is expected to become a red giant in about 5 billion years, expanding to 70 times its current size and bringing its surface extremely close to Earth's present orbit. See more at star. See Note at dwarf star.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.