To draw air audibly up the nose; to snuff; sometimes done as a gesture of suspicion, offense, or contempt
If someone sniffs a substance such as glue, they deliberately breathe in the substance or the gases from it as a drug. He felt light-headed, as if he'd sniffed glue. + sniffer sniffers sniff·er teenage glue sniffers
sensing an odor by inhaling through the nose inhale audibly through the nose; "the sick student was sniffling in the back row" perceive by inhaling through the nose; "sniff the perfume
A social custom to use when you greet other dogs Place your nose as close as you can to the other dog's rear end and inhale deeply, repeat several times, or until your person makes you stop
If you get a sniff of something, you learn or guess that it might be happening or might be near. You know what they'll be like if they get a sniff of a murder investigation Have the Press got a sniff yet? Then, at the first sniff of danger, he was back at his post. = whiff, hint