doubt - definition and synonyms

verb [transitive] 

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present tense
present participledoubting
past tensedoubted
past participledoubted
  1. 1
    to think that something is probably not true or that it probably does not exist

    Some people doubt my ability but I will prove them wrong.

    No one doubts the need for improvement.

    doubt (that):

    I don’t doubt you’re right, but I still disagree.

  2. 2
    to think that something is unlikely

    ‘Do you think they’ll win?’ ‘I doubt it.’

    doubt (that):

    He promised to come but I doubt he will.

    doubt whether/if:

    I doubt very much whether we can change it now.

  3. 3
    to feel that you cannot trust or believe someone

    How could you have doubted me?

derived word


noun [countable]