EW

from WordNet (r) 3.0 (2006)

EW
    n 1: military action involving the use of electromagnetic energy
         to determine or exploit or reduce or prevent hostile use of
         the electromagnetic spectrum [syn: {electronic warfare},
         {EW}]

from The Collaborative International Dictionary of English v.0.48

Ew \Ew\ ([=u]), n. [See {Yew}.]
   A yew. [Obs.] --Chaucer.
   [1913 Webster]