What is the meaning of Colossus?

A statue of gigantic size. The name was especially applied to certain famous statues in antiquity, as the Colossus of Nero in Rome and the Colossus of Rhodes, one of the Seven Wonders of the Ancient World.

Any creature or thing of gigantic size.

Somebody or something very greatly admired and respected.

colossus, giant statue

Source: wiktionary.org