Definitions

1. noun

a person or team that challenges another in a contest or competition, especially in sports or politics.

“The challenger team won the championship game.”

2. NIL

a spacecraft that approaches a planet or moon with the intention of landing or docking.

“The challenger spacecraft entered the planet’s atmosphere.”

3. noun

a person who challenges or contests something, such as a law or a decision.

“The challenger in the court case argued against the ruling.”

4. verb

to challenge or contest someone or something.

“The politician was challenged by her opponent in the election debate.”