1.Definition: a European river; flows into the Adriatic Sea

Category: Objects

2.Definition: a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army

Related Noun(s):petty officer

Category: People

3.Definition: 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

Related Noun(s):polonium

Category: General

4.Definition: an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States

Category: General