1

bug

noun \ ˈbəg \

Definition of bug

1 a : any of an order (Hemiptera and especially its suborder Heteroptera) of insects (such as an assassin bug or chinch bug) that have sucking mouthparts, forewings thickened at the base, and incomplete metamorphosis and are often economic pests called also true bug
b : any of various small arthropods (such as a beetle or spider) resembling the true bugs
c : any of several insects (such as a head louse) commonly considered obnoxious
2 : an unexpected defect, fault, flaw, or imperfection
  • the software was full of bugs
3 a : a microorganism (such as a bacterium or virus) especially when causing illness or disease
b : an often unspecified or nonspecific sickness presumed to be caused by such a microorganism
  • a stomach bug
4 : a concealed listening device
5 : a sudden enthusiasm
6 : enthusiast
  • a camera bug
7 : a prominent person
8 : a crazy person
9
[from its designation by an asterisk on race programs]
: a weight allowance given apprentice jockeys

Origin and Etymology of bug

origin unknown


2

bug

verb

Definition of bug

bugged; bugging
1 : bother, annoy
  • don't bug me with petty details
2 : to plant a concealed microphone in
: to lose one's composure : freak often used with out

First Known Use of bug

1935

in the meaning defined at transitive sense 2

See Words from the same year
NEW! Time Traveler

Other Insect Terms


3

bug

verb

Definition of bug

bugged; bugging
of the eyes : protrude, bulge often used with out
of the eyes : to cause to bug
  • his eyes were bugged with horror

Origin and Etymology of bug

probably from 1bug

Other Audio Recording Terms


4

bug

noun

Definition of bug

obsolete

Origin and Etymology of bug

Middle English bugge hobgoblin; probably akin to Low German bögge goblin


Bug

geographical name \ ˈbüg \

Definition of Bug

1 river over 450 miles (720 kilometers) long in central Europe rising in western Ukraine, forming part of Ukraine–Poland and Poland–Belarus borders, and flowing into the Vistula River in Poland
2 river over 500 miles (805 kilometers) long in southwestern Ukraine flowing southeast to the estuary of the Dnieper River


BUG Defined for Kids

1

bug

noun \ ˈbəg \

Definition of bug for Students

1 : any of a large group of insects that have four wings, suck liquid food (as plant juices or blood), and have young which resemble the adults but lack wings
2 : an insect or other small creeping or crawling animal
3 : flaw
  • a bug in the computer system

2

bug

verb

Definition of bug for Students

bugged; bugging
1 : 1bother 1, annoy
2 : to stick out often used with out
  • It was a grisly sight, and Mary Alice's eyes bugged.
  • —Richard Peck, A Long Way from Chicago

Medical Dictionary

bug

noun \ ˈbəg \

medical Definition of bug

1 a : an insect or other creeping or crawling invertebrate animal (as a spider) not used technically
b : any of various insects (as the bedbug or cockroach) commonly considered obnoxious
c : any of the order Hemiptera and especially of its suborder Heteroptera of insects that have sucking mouthparts, forewings thickened at the base, and that lack a pupal stage between the immature stages and the adult called also true bug
2 a : a microorganism (such as a bacterium or virus) especially when causing illness or disease
  • Enterococcus faecium, an especially nasty bug, often shrugs off even vancomycin, a last-resort antibiotic.
  • —Avery ComarowU.S. News & World Report4 Oct. 1999
b : an often unspecified or nonspecific sickness presumed to be caused by such a microorganism
  • a stomach bug
  • suffering from the flu bug

Law Dictionary

bug

transitive verb

legal Definition of bug

bugged; bugging
: to plant a concealed microphone in — compare eavesdrop, wiretap


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