a large, powerful animal of the cat family that hunts in groups and lives in parts of Africa and southern Asia. Lions have yellow-brown fur and the male has a mane (= long, thick hair round its neck). 狮；狮子 
The lion shook its mane and roared. 狮子抖动鬃毛，咆哮着。 a pride of lions (= a group of them) 一群狮子 Over the past two months, 13 lions have been killed by poachers. 在过去的两个月里，13只狮子被偷猎者杀死。 He had once been chased and almost eaten by a lion. 他曾经被一只狮子追赶，差点被狮子吃掉。 Young Masai men gather for traditional lion hunts. 年轻的马赛人聚集在一起进行传统的狮子狩猎。
Oxford Collocations Dictionary… of lions- pride
- growl
- roar
- attack somebody
- …
- cub
- tamer
- hunt
- …
Word OriginMiddle English: from Anglo-Norman French liun, from Latin leo, leon-, from Greek leōn, leont-.
Idioms
the lion’s den
a difficult situation in which you have to face a person or people who are unfriendly or aggressive towards you 龙潭虎穴
the lion’s share (of something)
the largest or best part of something when it is divided 最大（或最好）的一份
to beard the lion in his den
to go to see an important or powerful person to tell them that you disagree with them, that you want something, etc. 进狮穴捋狮须（敢于触犯有权势者）