Definition of blank noun from the Oxford Advanced American Dictionary

     

    blank

     noun
    noun
    NAmE//blæŋk//
     
     
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  1. 1[countable] an empty space on a printed form or document for you to write answers, information, etc. in Please fill in the blanks. If you can't answer the question, leave a blank.
  2. 2[singular] a state of not being able to remember anything My mind was a blank and I couldn't remember her name.
  3. 3[countable] (also blank cartridge) a cartridge in a gun that contains an explosive but no bullet The troops fired blanks in the air.
  4. Idioms
    draw a blank
     
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    to get no response or result So far, the police investigation has drawn a blank.
See the Oxford Advanced Learner's Dictionary entry: blank