the action of drawing in air audibly through the nose

he is easy to find due to his sniffing and sneezing

characterized by or resembling the sound of air being drawn in audibly through the nose

my dog has been making a sniffing sound for the past few days

draw up air audibly through the nose to detect a smell, to stop it running, or to express contempt

his dog sniffed at my trousers

‘You're behaving in an unladylike fashion,’ sniffed Mother