PROM

n. formal dance celebrating the end of high school (in the USA)

(Computers) read-only memory than can be programmed (written) again

The abbreviation PROM can stand for the following:Programmable read-only memory, related to electronicsPremature rupture of membranes, an obstetric termPockels readout optical modulator
See more at Wikipedia.org...

An unrelated television movie, Prom Queen: The Marc Hall Story, aired on CTV in 2004. In the United States and Canada a prom, short for promenade, is used to describe a formal dance held at the end of an academic year. In the United Kingdom, the term is more widely understood to be in reference to a season of classical concerts or "proms", which have been held between July and September since 1895, today run by the BBC. The British synonym for the North American event would be Valedictory Ball, Leavers' Ball, Leavers' Dinner or informally Leavers' Do, closer to the Australian description (see below.) In Canada the terms Grad or Formal are most common and the event is usually only held for those in their graduating year of high school or middle school.
See more at Wikipedia.org...

Noun
1. a formal ball held for a school class toward the end of the academic year
(synonym) promenade
(hypernym) ball

Acronym for programmable read-only memory.

A storage device that, after being written to once, becomes a read-only memory.

Programmable Read-Only Memory