PMS (Noun) — A syndrome that occurs in many women from 2 to 14 days before the onset of menstruation.
PMS (Noun) — Modulation of the phase of the carrier wave.
PMS (Noun) — An examination and dissection of a dead body to determine cause of death or the changes produced by disease.
PMS (Noun) — The person who holds the position of head of the government in the United Kingdom.