1. challenger - Noun
2. Challenger - Proper noun
One who challenges.
Source: Webster's dictionaryAfter the Challenger accident, NASA put in a lot of time to improve the safety of the space shuttle to fix the things that had gone wrong. Sally Ride
The space shuttle is a better and safer rocket than it was before the Challenger accident. Sally Ride
The perverse presumption that places the burden of proof on the challenger of spending must be inverted, back to the rule that applies elsewhere in life: 'Prove to me why we should.' Mitch Daniels
As we reflect back upon the tragic loss of Challenger and her brave crew of heroes who were aboard that fateful day, I am reminded that they truly represented the best of us, as they climbed aloft on a plume of propellant gasses, reaching for the stars, to inspire us who were Earthbound. Buzz Aldrin
The Deep Flight Challenger technology is a game-changer for ocean exploration. Graham Hawkes
The challenger is beaten. Latin Proverb