eu Meaning, Definition & Usage

  1. noun a bivalent and trivalent metallic element of the rare earth group
    atomic number 63; europium.
  2. noun an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members
    Europe; European Community; EC; European Economic Community; Common Market; European Union; EEC.
    • he tried to take Britain into the Europen Union

WordNet

Eu
Etymology
Gr. well, orig. neut. of good; prob. connected with Skr. su, from the same root as E. is; or with Skr. vasu good, prob. fr. the same root as E. was.
Definitions
  1. A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-.

Webster 1913