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Definition of question mark noun from the Oxford Advanced Learner's Dictionary

question mark

noun
 
/ˈkwestʃən mɑːk/
 
/ˈkwestʃən mɑːrk/
Idioms
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  1. the mark ( ? ) used in writing after a questionTopics Languagea2
    Oxford Collocations Dictionaryadjective
    • big
    • huge
    • major
    verb + question mark
    • put
    question mark + verb
    • hang over something
    • remain
    preposition
    • question mark against
    • question mark over
    See full entry
Idioms
a question mark over/against something
  1. used to say that something is not certain
    • There's still a big question mark hanging over his future with the team.
    Extra Examples
    • A slight question mark against her character remains.
    • There is now a serious question mark over his leadership ability.
    Topics Doubt, guessing and certaintyc2
See question mark in the Oxford Advanced American DictionarySee question mark in the Oxford Learner's Dictionary of Academic English
alloy
noun
 
 
From the Topic
Physics and chemistry
C2
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