titan

Short definition from Wiktionary

Noun

1. 1
   Something or someone of very large stature, greatness, or godliness.
2. 2
   Any of the race of giant gods in Greek mythology that preceded and was overthrown by the Olympian gods.

Proper noun

1. 1
   Another name for Helios, a personification of the Sun.
2. 2
   A moon in Saturn, Solar System. The largest moon of the planet Saturn.