1.collar的基本意思是“领子”,可指外套的衣领,也可指衬衫等的领子。collar引申可指“动物(尤指狗)的颈部所戴的项圈”。
2.collar可以和某些特殊的形容词(如表示颜色)连用,表示职业。
3.in collar的意思是“有事做”; in the collar的意思是“受约束”。

collar and tie
讲究的装束 good clothes
When my father came home from the pits and had his bath, he would always put on collar and tie whether he was going out anywhere or not.当我父亲从矿井上回家并洗完澡后,不管出不出门,他总穿上讲究的装束。
“You cannot go visiting your aunt Doris in hospital without a collar and tie,” his wife nagged at him.“你不能不穿上讲究的衣服就去医院看多丽丝大婶,”他的妻子说。

He turned his overcoat collar up.他把外套的衣领翻了起来。
The collar comes off this shirt and can be washed separately.这件衬衫的领子可以拿下来分别洗。
Why not turn your collar up against the wind?为什么不把你的衣领竖起来挡风呢?
What size of collar is this shirt?这衬衣领子的尺寸是多少?
Where are the dog's collar and lead?狗的项圈和链子哪儿去了?
The animal has a black collar and is therefore a different type from that.这只动物颈部有一圈黑毛,因此与那一只不是同一类。
Our dog has its name on its collar.我们的狗的项圈上有它的名字。
After graduation, she picked up a pink-collar job as a secretary in a big company.她毕业后便在一家大公司里当上了一名白领女秘书。
Some day steel-collar workers may take the place of human beings.有一天机器人也许会代替人干活。
Measures are taken to battle rising mandarin-collar crime.已经采取了措施来打击官员中不断上升的犯罪行为。
They belong to the grey-collar people.他们是服务行业中的工作人员。
He is not in collar at present.现在他还闲着。
You are in the collar now. Marriage has its obligations.你现在受约束了,结婚是有责任的。

［词源］  ＜中古英语coler＜拉丁语collare＜古法语colier(颈)