Noun has 2 senses

• eu(n = noun.substance) atomic number 63, europium - a bivalent and trivalent metallic element of the rare earth group;



• eu(n = noun.group) common market, ec, eec, europe, european community, european economic community, european union - 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"