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bug

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noun British English pronunciation: bug /bʌɡ/ 
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singularbug
pluralbugs
 
  1. 1
    [countable] informal an infectious but usually minor illness

    a flu bug

    get/pick up a bug (=develop an illness):

    You must have picked up a bug on holiday.

  2. 2
    [countable] computing a minor fault in a computer system or in a computer program

    The new program still has some bugs in it.

  3. 3
    [singular] informal a sudden strong enthusiasm for doing something
    be bitten by the travel/fitness/cooking etc bug (=to suddenly become enthusiastic about it):

    I'd been bitten by the back-packing bug.

  4. 4
    [countable] a small piece of electronic equipment used for secretly listening to what people are saying

    Detectives had planted (=put) a bug in his hotel room.

  5. 5
    [countable] informal an insect

    There were bugs crawling all over the kitchen floor.

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