It means post meridiem which is latin meaning after noon
post meridian
post meridium
pm mean past miday and am mean after midnight
pm is the symbol of the picometer; 1 pm = 10-12meter.
Post Morning
PM stands for Personal Message. In Twitter this is a direct message.
It stands for post meridiem which means "after midday" in Latin
MP stand for "Member of Parliament"whereas PM Stand for "Prime Minister"Some other Abbreviates of these are........"Post Meridian", "Mandal Parishadh", "Mega Pixel"
Prime Minister?
antemeridiem and postmeridiem
Plus-minus
Prime Meridian