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adjective [usually before noun] British English pronunciation: hidden /ˈhɪd(ə)n/
  1. 1
    if something is hidden, most people do not know about it or understand it

    Jones has recently revealed hidden talents as an actor.

    the hidden costs of being in hospital

  2. 2
    a hidden object or place is not easy to find

    a hidden tape recorder/camera

    hidden valleys

hostile architecture

the design of buildings or public spaces in a way which discourages people from touching, climbing or sitting on them …

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boots on the ground

a situation in which a country's armed forces are physically present in an area of conflict …

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