Note: The spelling 'Prom' is usually used for meaning 3.
A ~ is a formal dance at a school or college which is usually held at the end of the academic year. (AM)
I didn’t want to go to the ~ with Craig.
The ~ is the road by the sea where people go for a walk. (BRIT)
N-SING: usu the N
The Proms are a series of concerts of mainly classical music that are held each year in London and some other cities. There is usually an area at these concerts where people stand, as well as seats. (mainly BRIT)
N-PLURAL: also N n