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REFERENCE

lookout

n.
US //ˈɫʊˌkaʊt// UK //lˈʊkaʊt// look·out
  1. 1 a person on watch (n.)
    B2 Upper Intermediate

    a person who is responsible for watching for danger or for something approaching.

    a person stationed to keep watch for approaching danger, enemies, or specific events.

    Example

    The bank robbers left one man outside to act as a lookout for the police.

    Example

    The ship's lookout was the first to spot the distant lights of the harbour through the thick morning fog.

    Usage

    Often used with the indefinite article 'a'.

  2. 2 the act of watching (n.)
    B2 Upper Intermediate

    the act of watching carefully for something, often used in the phrase 'on the lookout'.

    the act or state of keeping a systematic watch for someone or something.

    Example

    You should be on the lookout for a blue car parked near the entrance.

    Example

    Security teams remained on the lookout for any suspicious activity during the high-profile political summit.

    Usage

    Commonly appears in the idiomatic phrase 'on the lookout for'.

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  1. 3 a vantage point (n.)
    B2 Upper Intermediate

    a high place where you can see a long way, like a balcony or a hill.

    an elevated place or structure that affords a wide view of the surrounding area.

    Example

    We stopped at a mountain lookout to take photos of the valley below.

    Example

    The coastal lookout provided the rangers with an unobstructed view of the migrating whale pods.

  2. 4 personal concern (n.)
    C1 Advanced British English Informal

    your own problem or responsibility.

    an individual's personal concern, prospect, or responsibility.

    Example

    If he chooses to ignore the warning, that is his lookout.

    Example

    The manager made it clear that if the staff failed to meet the deadline, it would be their own lookout during the performance review.

    Teacher's tip

    This sense is primarily British and can sound slightly dismissive or cold.

Origin

Deverbal from look out.

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