n.

1. 竞争，角逐[U][（+with/between/for）]
   Competition among youths to enter the best colleges is intense.

   年轻人想进一流大学的竞争是很激烈的。

2. 比赛，竞赛；赛会[C][+to-v]
   I entered a chess competition and finished third.

   我参加了象棋比赛名列第三。

3. （总称）竞争者；比赛对手[U]
   He's no competition for Henry.

   他不是亨利的对手。

n.

1. the activity or condition of competing against others.
   ▸Ecology  interaction between species or organisms which share a limited environmental resource.
2. an event or contest in which people compete.
   ▸those with whom one is competing:

   you have to innovate to stay ahead of the competition.