Definition of sniff noun from the Oxford Advanced American Dictionary

     

    sniff

     noun
    noun
    NAmE//snɪf//
     
     
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  1. 1[countable] an act or the sound of sniffing She took a deep sniff of the perfume. My mother gave a sniff of disapproval. His sobs soon turned to sniffs.
  2. 2[singular] sniff of something an idea of what something is like or that something is going to happen The sniff of power went to his head. They make threats but back down at the first sniff of trouble.
  3. 3[singular] sniff of something a small chance of something She didn't get even a sniff at a medal.
  4. Idioms
    have a (good) sniff around
     
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    to examine a place carefully
See the Oxford Advanced Learner's Dictionary entry: sniff