(US, Canadian) An institution dedicated to teaching and learning; an educational institution.
Our children attend a public school in our neighborhood.
Harvard University is a famous American postsecondary school.
(UK) An educational institution providing primary and secondary education, prior to tertiary education (college or university).
Within a larger educational institution, an organizational unit, such as a department or institute, which is dedicated to a specific subject area.
We are enrolled in the same university, but I attend the School of Economics and my brother is in the School of Music.
(considered collectively) The followers of a particular doctrine; a particular way of thinking or particular doctrine; a school of thought.
These economists belong to the monetarist school.
A group of fish or a group of marine mammals such as porpoises, dolphins, or whales.
The divers encountered a huge school of mackerel.
The time during which classes are attended or in session in an educational institution.
I'll see you after school.