definition of
sniff

[1] #1 sniff v. [whiff] perceive by inhaling through the nose; "sniff the perfume". wn

[2] #2 sniff v. [sniffle] inhale audibly through the nose; "the sick student was sniffling in the back row". wn

[3] #3 sniff n. [snuff] sensing an odor by inhaling through the nose. wn