sniffle /ˈsnɪf.əl/verb 2noun 1forms 3 verb2 •To make a whimpering or sniffing sound when breathing, because of a runny nose.Her dad heard her sniffling and passed her a handkerchief. •To utter with a whimpering or sniffing sound.He sniffled a pathetic apology. noun1 •The act, or the sound of sniffling; the condition of having a runny or wet nose, as from a cold or allergies.I sometimes have a sniffle during allergy season. formssniffled · sniffling · sniffles