definition of
PM

[1] #1 PM n. [autopsy, necropsy, postmortem, post-mortem, postmortem examination, post-mortem examination] an examination and dissection of a dead body to determine cause of death or the changes produced by disease. wn

[2] #2 PM n. [promethium, Pm, atomic number 61] 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. wn

[3] #3 PM n. [Prime Minister, premier] the person who holds the position of head of the government in the United Kingdom. wn

[4] #4 PM n. [phase modulation] modulation of the phase of the carrier wave. wn