crowds of与a crowd of意思是否一样?crowd这个词具体有什么用法?

crowds of与a crowd of意思是否一样?crowd这个词具体有什么用法?
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crowd
KK:[]
DJ:[]
n.
1.人群[C][G]
There was a crowd of people in front of the town hall.
市政大厅前有一群人.
2.【口】一伙,一帮[C]
Sam and his crowd went into the discotheque.
山姆及其一伙走进了那家迪斯科舞厅.
3.一堆,许多[C]
I saw a crowd of magazines and papers on her desk.
我看见她桌上放着一堆杂志和报纸.
4.大众[the S]
You can do what you want to do,but never follow the crowd.
你想做什么就做什么,可别随大流.
vt.
1.挤满
Passengers crowded the platform.
月台挤满了乘客.
2.将...塞进[O]
He crowded more books onto the shelf.
他向书架上又塞了一些书.
3.催促;催逼
Don't crowd me,I'll pay.
别催逼我,我会付的.
vi.
1.挤,拥挤[Q]
People crowded into the cinema.
人们挤进电影院.
2.聚集