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Definition of brain freeze noun from the Oxford Advanced Learner's Dictionary

brain freeze

noun
 
/ˈbreɪn friːz/
 
/ˈbreɪn friːz/
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  1. [countable, uncountable] a sudden failure to remember a basic fact, name or word, especially when this is embarrassing or in public
    • He suffered a brain freeze on last night’s TV debate.
    • My problem was brain freeze: I knew who she was—I just couldn’t remember her name.
  2. [uncountable] a sudden severe headache caused by eating or drinking something very cold too quickly
    • Summer means ice cream, and that means brain freeze—the sudden stabbing pain between the eyes.
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