Po - Definition

n 1: a radioactive metallic element that is similar to tellurium
and bismuth; occurs in uranium ores but can be produced by
bombarding bismuth with neutrons in a nuclear reactor [syn:
polonium, Po, atomic number 84]
2: a noncommissioned officer in the Navy or Coast Guard with a
rank comparable to sergeant in the Army [syn: petty
officer, PO, P.O.]
3: a European river; flows into the Adriatic Sea [syn: Po, Po
River]
4: an independent agency of the federal government responsible
for mail delivery (and sometimes telecommunications) between
individuals and businesses in the United States [syn: United
States Post Office, US Post Office, Post Office, PO]