(idiomatic) During every week; continuously.

(chiefly Britain and Ireland, university slang) An annual event in many universities where students engage in unusual activities to raise money for charity.

(British slang, vulgar) The days of the month when a woman has her period.

In a college or university, the week immediately preceding finals week.

(Britain) The week before the academic aspects of a university start, when students may socialize and undergo induction.

The week preceding Easter containing Palm Sunday, Holy Monday, Holy Tuesday, Holy Wednesday (Spy Wednesday), Holy Thursday (Maundy Thursday), Holy Friday (Good Friday), and Holy Saturday.

(Australia, informal) An imagined or symbolic time when assumedly unsophisticated people from the countryside come to the city, likely to be preyed on by tricksters there, or who are unaware of social norms in the city.

(Britain) The days of the week that are usually worked on, i.e. Monday to Friday.

plural of working week

Dated spelling of weekend.