Definition of arena
1
: an area in a Roman amphitheater for gladiatorial combats
2a
: an enclosed area used for public entertainment
b
: a building containing an arena
3a
: a sphere of interest, activity, or competition
the political arena
b
: a place or situation for controversy
in the public arena
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Merriam-Webster unabridged
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Time Traveler for arena
The first known use of arena was in 1600
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