Noun
a statue of gigantic size and proportions
https://www.merriam-webster.com/dictionary/colossus
In, “The Way We Live Now 11-11-01; Lost and Found” by Colson Whitehead, the author states ‘who is starting her first week of work at a Park Avenue South insurance firm, that colossus squatting over Grand Central is the Met Life Building, and for her it always will be’.
The author Colson Whitehead meant that the Met Life Building is a huge building that towers over New York City, and is one of many tall buildings in NYC that are notoriously noticeable.