red giant

Definition of Red Giant in English :

1. red giant, red giant star

a large, old, luminous star; has a relatively low surface temperature and a diameter large relative to the sun

WordNet Lexical Database for English. Princeton University. 2010.

Red Giant

noun

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

a star of low surface temperature but with great luminosity resulting from its great size

n.

A low-mass star of great size and luminosity that has a relatively low surface temperature, giving it a reddish or orange hue.