p.m.

(noun) 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, PM, postmortem examination, post-mortem examination.

(noun) 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: promethium, Pm, atomic number 61.

(noun) the person who holds the position of head of the government in the United Kingdom. Synonyms: Prime Minister, PM, premier.

(noun) modulation of the phase of the carrier wave. Synonyms: phase modulation, PM.

(adj) after noon. Synonyms: post meridiem.

(adv) between noon and midnight. Synonyms: post meridiem, P.M.. Example: "Let's meet at 8 p.m.."