A person or thing of very great strength, intellect, or importance.
"Her thirty years of experience have made her a titan in the industry."
Any of a family of giants in Greek mythology born of Uranus and Gaea and ruling the earth until overthrown by the Olympian gods
"Cronus and Themis became some of the most revered Titans."
Titan or Helios; early 15c., from Latin titan, from Greek titan, "a member of a mythological race of giants" (originally six sons and six daughters of Gaia and Uranus) who were overthrown by Zeus and the other gods. The war was a popular theme for Greek artists and writers. The name is perhaps from titō "sun, day," which probably is a loan-word from a language of Asia Minor. The sense of "person or thing of enormous size or ability" is by 1828.