From WordNet (r) 3.0 (2006):
bug
n 1: general term for any insect or similar creeping or crawling
invertebrate
2: a fault or defect in a computer program, system, or machine
[syn: bug, glitch]
3: a small hidden microphone; for listening secretly
4: insects with sucking mouthparts and forewings thickened and
leathery at the base; usually show incomplete metamorphosis
[syn: hemipterous insect, bug, hemipteran,
hemipteron]
5: a minute life form (especially a disease-causing bacterium);
the term is not in technical use [syn: microbe, bug,
germ]
v 1: annoy persistently; "The children teased the boy because of
his stammer" [syn: tease, badger, pester, bug,
beleaguer]
2: 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: wiretap, tap, intercept,
bug]