Definitions

1. noun

A person, especially a male, who possesses or exercises great physical or mental strength, courage, or endurance, especially in competition or under difficult conditions.

“The ironman competitor completed a 140.6-mile course in under 10 hours.”

2. proper noun

A fictional superhero created by Marvel Comics, known for wearing a powered exoskeleton suit.

“Tony Stark is the alter ego of the superhero Iron Man.”