Arena (noun)

1. A large, enclosed area for sports or entertainment.
2. A place or field where a particular activity or pursuit takes place.

Origin:

From the latin word "arena" meaning "sand" or "open space for public events".

Examples:

1. The arena was filled with cheering fans.
2. The basketball game was held in the arena.
3. He was a veteran of the political arena.
4. The company is entering a new arena of competition.
5. The arena was built to host large events.