Meaning of BUG in English

BUG

I. ˈbəg noun

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

Date: 14th century

obsolete : bogey , bugbear

II. noun

Etymology: origin unknown

Date: 1622

1.

a. : an insect or other creeping or crawling invertebrate (as a spider or centipede)

b. : any of several insects (as the bedbug or cockroach) commonly considered obnoxious

c. : any of an order (Hemiptera and especially its suborder Heteroptera) of insects that have sucking mouthparts, forewings thickened at the base, and incomplete metamorphosis and are often economic pests — called also true bug

2. : an unexpected defect, fault, flaw, or imperfection

the software was full of bug s

3.

a. : a germ or microorganism especially when causing disease

b. : an unspecified or nonspecific sickness usually presumed due to a bug

4. : a sudden enthusiasm

5. : enthusiast

a camera bug

6. : a prominent person

7. : a crazy person

8. : a concealed listening device

9.

[from its designation by an asterisk on race programs]

: a weight allowance given apprentice jockeys

III. verb

( bugged ; bug·ging )

Date: 1935

transitive verb

1. : to plant a concealed microphone in

2. : bother , annoy

don't bug me with petty details

intransitive verb

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

IV. verb

( bugged ; bug·ging )

Etymology: probably from bug (II)

Date: 1865

intransitive verb

of the eyes : protrude , bulge — often used with out

transitive verb

: to cause to bug

his eyes were bugged with horror

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.