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IELTS BNC: 7685 COCA: 4159

bug

1 of 4

noun (1)

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

bug

2 of 4

verb (1)

bugged; bugging

transitive verb

1
: bother, annoy
don't bug me with petty details
2
: to plant a concealed microphone in

intransitive verb

: to lose one's composure : freak
often used with out

bug

3 of 4

verb (2)

bugged; bugging

intransitive verb

of the eyes : protrude, bulge
often used with out

transitive verb

of the eyes : to cause to bug
his eyes were bugged with horror

bug

4 of 4

noun (2)

obsolete

Word History

Etymology

Noun (1)

origin unknown

Verb (2)

probably from bug entry 1

Noun (2)

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

First Known Use

Noun (1)

1594, in the meaning defined at sense 1b

Verb (1)

1935, in the meaning defined at transitive sense 2

Verb (2)

1865, in the meaning defined at transitive sense

Noun (2)

15th century, in the meaning defined above

Time Traveler
The first known use of bug was in the 15th century

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