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secret - definition and synonyms


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noun [countable] secret pronunciation in American English /ˈsikrət/
Word Forms
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  1. 1
    a piece of information that is known by only a small number of people, and is deliberately not told to other people
    It cannot remain a secret much longer.
    I can’t tell you what she said – it’s a secret.
    He was accused of selling business secrets to competitors.
    Your secret is safe with me (=I will not tell anyone).
    The secret is out (=everyone knows about it).
    keep a secret (=not tell anyone): Can you promise to keep a secret?
    keep something a secret (from someone): Mandela kept his work a secret from the prison authorities.
    let someone in on a secret (=tell someone a secret): Listen, I’ll let you in on a little secret.
  2. 2
    [usually plural] something that cannot be explained or that is difficult to understand
    What secrets of the universe will the new telescope reveal?
  3. 3
    a particular way of achieving something
    She always looks so slim – I wish I knew her secret.
    The secret is always to warm the pot before putting in the tea.
    secret of: The secret of our success is having highly skilled workers.



a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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