Definition of ice giant in English:

ice giant

Pronunciation /ˌʌɪs ˈdʒʌɪənt/


  • 1Mythology
    = frost giant .

  • 2Astronomy
    A giant planet, such as Uranus and Neptune, whose interior is thought to contain a significant proportion of water, methane, and other normally volatile compounds in condensed forms.


Mid 19th century; earliest use found in Encyclopedia Americana. From ice + giant.