/wi:k ||; wik/noun[C] 1 a period of seven days, especially from Monday to Sunday or from Sunday to Saturday 星期；周: We arrived last week. 我们上星期到达。He left two weeks ago. 他两个星期以前走了。I haven't seen her for a week. 我一个星期没见过她了。I go there twice a week. 我一星期去那里两次。They'll be back in a week/in a week's time. 他们一星期后回来。 ☞In British English, a period of two weeks is usually called a fortnight. 在英国英语中，两星期通常叫做fortnight。
2 the part of the week when people go to work, etc, usually from Monday to Friday 一星期中工作的时间（通常指周一至周五）: She works hard during the week so that she can enjoy herself at the weekend. 她平日努力工作，到周末就可以享受一下。I work a 40-hour week. 我每星期工作40小时。
today, tomorrow, Monday, etc week seven days after today, tomorrow, Monday, etc 今天╱明天╱星期一的七天之后；…的七天后
week in, week out every week without a rest or change 一周又一周:
He's played for the same team week in, week out for 20 years. 一周又一周，他已连续20年为同一个球队打球。 a week yesterday, last Monday, etc seven days before yesterday, Monday, etc 昨天╱上星期一的七天之前；…的七天前