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Meaning of “bug” - Learner’s Dictionary

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 Learner’s Dictionary © Cambridge University Press)
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