(education) An institution which provides all or part of secondary education. / (Canada, US, Australia) Secondary school.

(colloquial, derogatory) A college, university, or any institution of higher learning in which there exists a culture of ribaldry and licentiousness amongst the student population.

(informal, idiomatic) A style, way of thinking, or method for accomplishing a task that was employed in a former era, remembered either for its inferiority to the current method, or for its time-honored superiority over the new way.

(informal, idiomatic) Characteristic of a style, outlook, or method employed in a former era, remembered either as inferior to the current style, or alternately, remembered nostalgically as superior or preferable to the new style, the older denoting something that would be considered out of date or out of fashion to some, but as such, is considered by others as cool and hip.

A school, organized by a church, that provides religious education to children on Sundays.

(dated) A penal institution for juveniles, especially males.

A governing body of people elected (a board of directors or board of trustees) to oversee management of a school district and represent the interests of residents.

Being of an age during which attendance at school is customary.

An opinion subscribed to by some connected or arbitrary group.

(UK, education) A kind of state-funded school in England that is independent of direct control by local government and has a curriculum specialism.