[1] : The Collaborative International Dictionary of English v.0.48

wiretap \wiretap\ n.
   the act or event of tapping a telephone or telegraph line to
   get information surreptitiously.
   wordnet 1.5

[2] : The Collaborative International Dictionary of English v.0.48

wiretap \wiretap\ v. t.
   to tap5 a telephone or telegraph line to get information
   surreptitiously; also, to obtain or record information by
   use of a wiretap.
   wordnet 1.5

[3] : WordNet (r) 2.0

wiretap
     n : the act of tapping a telephone or telegraph line to get
         information syn: tap
     v : tap a telephone or telegraph wire to get information; "the
         fbi was tapping the phone line of the suspected spy"; "is
         this hotel room bugged?" syn: tap, intercept, bug
see also:
tap intercept bug 

[4] : Moby Thesaurus II by Grady Ward, 1.0

46 moby thesaurus words for "wiretap":
   attend, attend to, auscultate, be all ears, bend an ear, bug,
   bugging, cloak-and-dagger work, cock the ears, counterespionage,
   counterintelligence, eavesdrop, electronic surveillance, espial,
   espionage, examine by ear, following, give attention,
   give audience to, give ear, hark, hear, hear out, hearken, heed,
   intelligence, intelligence work, intercept, lend an ear, listen,
   listen at, listen in, listen to, military intelligence,
   observation, secret police, secret service, shadowing, sit in on,
   spying, stakeout, surveillance, tailing, tap, trailing,
   wiretapping

Wiretap >> W Words
Wiretap, definition of term: Wiretap
wiretap_pag1.html