Fetching details from the dictionary...

defeat; loss; losing (a game)
failing to live up to (one's name, looks, etc.)
discount; loss (on a sale)
試合に負けて悔しい思いをしている。
I feel frustrated losing the game.
勝ち負けよりも楽しむことが大切だと思う。
I think enjoying is more important than winning or losing.
負けず嫌いな性格が成功の秘訣らしい。
Apparently being a sore loser is the secret to success.