Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “bug”

See all translations

bug

noun [C]
 
 
/bʌɡ/
ILLNESS B2 a bacteria or virus, or the illness that it causes: a flu / stomach bug Bacteria, moulds, germs and virusesNot fit and healthyThin or slender (of people)
COMPUTER B2 a mistake in a computer program: This program is full of bugs.Faults and mistakesComputer programming and software
INSECT B1 a small insectInsect names
EQUIPMENT a small, electronic piece of equipment used to secretly listen to people talkingSpying and espionage
be bitten by the bug/get the bug informal to develop a strong interest or enthusiasm for a particular activity: He's been bitten by the tennis bug.Excited, interested and enthusiastic
(Definition of bug noun from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

More Learner's Dictionary definitions for “bug”

Definitions of “bug” in other dictionaries

Word of the Day

justice

fairness in the way people are dealt with

Word of the Day

A certain je ne sais quoi: French words and phrases used in English

by Liz Walter,
January 21, 2015
It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

Read More 

flower beard noun

January 19, 2015
a beard adorned with flowers And some of said beard-rockers are even turning it up a notch, painting trend on top of trend with what’s come to be known as ‘the flower beard.’

Read More