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participation (in a tournament, match, race, etc.); entry; taking part (in); competing (in); appearance
appearance (on the stage, television, etc.)
exiting (a venue, train station, etc.); exit
being dispatched (of an ambulance, fire engine, etc.)
「出場」 has another reading with different meanings.
オリンピックに出場するのが夢です。
My dream is to participate in the Olympics.
彼女は初めてオリンピックに出場した。
She competed in the Olympics for the first time.
けがのため今回の大会に出場できなかった。
I couldn't compete in this tournament due to injury.