1. (

• europium ,
• Eu ,
• atomic_number_ ,

) a bivalent and trivalent metallic element of the rare earth group ;

2. (

• European_Union ,
• EU ,
• European_Community ,
• EC ,
• European_Economic_Community ,
• EEC ,
• Common_Market ,
• Europe

) an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members; "he tried to take Britain into the Europen Union" ;