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

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

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

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

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.

(Australia) A festival during which finishing high school students celebrate the end of their studies, and associated freedom.

In the calendar reform, a week added to usual 52, such that every year starts on the same day

A period of seven years.