'Bug' definitions:

Definition of 'bug'

(from WordNet)
noun
General term for any insect or similar creeping or crawling invertebrate
noun
A fault or defect in a computer program, system, or machine [syn: bug, glitch]
noun
A small hidden microphone; for listening secretly
noun
Insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis [syn: hemipterous insect, bug, hemipteran, hemipteron]
noun
A minute life form (especially a disease-causing bacterium); the term is not in technical use [syn: microbe, bug, germ]
verb
Annoy persistently; "The children teased the boy because of his stammer" [syn: tease, badger, pester, bug, beleaguer]
verb
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]

Definition of 'Bug'

From: GCIDE
  • Bug \Bug\ (b[u^]g), n. [OE. bugge, fr. W. bwg, bwgan, hobgoblin, scarecrow, bugbear. Cf. Bogey, Boggle.]
  • 1. A bugbear; anything which terrifies. [Obs.] [1913 Webster]
  • Sir, spare your threats: The bug which you would fright me with I seek. --Shak. [1913 Webster]
  • 2. (Zool.) A general name applied to various insects belonging to the Hemiptera; as, the squash bug; the chinch bug, etc. [1913 Webster]
  • 3. (Zool.) An insect of the genus Cimex, especially the bedbug (Cimex lectularius). See Bedbug. [1913 Webster]
  • 4. (Zool.) One of various species of Coleoptera; as, the ladybug; potato bug, etc.; loosely, any beetle. [1913 Webster]
  • 5. (Zool.) One of certain kinds of Crustacea; as, the sow bug; pill bug; bait bug; salve bug, etc. [1913 Webster]
  • Note: According to popular usage in England and among housekeepers in America around 1900, bug, when not joined with some qualifying word, was used specifically for bedbug. As a general term it is now used very loosely in America as a colloquial term to mean any small crawling thing, such as an insect or arachnid, and was formerly used still more loosely in England. "God's rare workmanship in the ant, the poorest bug that creeps." --Rogers (--Naaman). "This bug with gilded wings." --Pope. [1913 Webster +PJC]
  • 6. (Computers) An error in the coding of a computer program, especially one causing the program to malfunction or fail. See, for example, year 2000 bug. "That's not a bug, it's a feature!" [PJC]
  • 7. Any unexpected defect or flaw, such as in a machine or a plan. [PJC]
  • 8. A hidden electronic listening device, used to hear or record conversations surreptitiously. [PJC]
  • 9. An infectious microorganism; a germ[4]. [Colloq.] [PJC]
  • 10. An undiagnosed illness, usually mild, believed to be caused by an infectious organism. [Colloq.]
  • Note: In some communities in the 1990's, the incidence of AIDS is high and AIDS is referred to colloquially as "the bug". [PJC]
  • 11. An enthusiast; -- used mostly in combination, as a camera bug. [Colloq.] [PJC]
  • Bait bug. See under Bait.
  • Bug word, swaggering or threatening language. [Obs.] --Beau. & Fl. [1913 Webster]

Definition of 'Bug'

From: GCIDE
  • Bug \Bug\ (b[u^]g), v. t. to annoy; to bother or pester. [PJC] Bugaboo

Synonyms of 'bug'

From: Moby Thesaurus