bug

/bʌg/ noun [C]

Definition

ILLNESS › a bacteria or virus, or the illness that it causes: a flu / stomach bug

COMPUTER › a mistake in a computer program: This program is full of bugs.

INSECT › a small insect

EQUIPMENT › a small, electronic piece of equipment used to secretly listen to people talking

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.

(Definition of bug noun from the Cambridge Learner's Dictionary © Cambridge University Press)

something which threatens to cause problems or unhappiness in the future

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