DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sniff
       n 1: sensing an odor by inhaling through the nose [syn: sniff,
            snuff]
       v 1: perceive by inhaling through the nose; "sniff the perfume"
            [syn: sniff, whiff]
       2: inhale audibly through the nose; "the sick student was
          sniffling in the back row" [syn: sniff, sniffle]