Definitions

1. noun

A chemical element with the symbol Kr and atomic number 36; a colorless, odorless, and heavy noble gas.

“The superpowers of Superman originate from the planet Krypton.”

2. proper noun

A fictional planet in the Superman stories, the home world of Superman.

“The citizens of Krypton were unaware of the impending catastrophe that would destroy their planet.”

3. adjective

Related to or characteristic of Krypton or its people.

“The Kryptonian culture was highly advanced and influential.”