pm meaning and definition

PM noun

Definition of PM (noun)

1. an examination and dissection of a dead body to determine cause of death or the changes produced by disease
   • synonyms: autopsy, necropsy, postmortem, post-mortem, postmortem examination, post-mortem examination
2. a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
   • synonyms: atomic number 61, promethium
3. the person who holds the position of head of the government in the United Kingdom
   • synonyms: premier, Prime Minister
4. modulation of the phase of the carrier wave
   • synonyms: phase modulation