A festival at a school; specifically an event organized by a school (typically to raise money for a charity or for the school itself), and featuring bazaars, amusements, competitions, etc.
Origin
Early 19th century.
Definition of school fete in US English:
school fete
noun
A festival at a school; specifically an event organized by a school (typically to raise money for a charity or for the school itself), and featuring bazaars, amusements, competitions, etc.