Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “bug”

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

dawn on sb

If a fact dawns on you, you understand it after a period of not understanding it.

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More