Dreaming of an arena means you have some issues to conquer. Bringing them into the open arena will allow you to deal with it individually while others cheer you on. This is a fight that you will fight on your own whether you win or lose. In the waking hours, continue to hone your skills in preparation to beat the challenge.
If you dream of being in an arena filled with spectators, this could represent a desire to perform or achieve something in your waking life. You may be feeling a need to impress or succeed in front of others in order to gain their approval or admiration.
If you dream of being in an arena but feeling confident and triumphant, this could symbolize a recent success or accomplishment in your waking life. You may be feeling proud and satisfied with your performance, and are ready to take on new challenges.