postnasal drip n flow of mucous secretion from the posterior part of the nasal cavity onto the wall of the pharynx occurring usu. as a chronic accompaniment of an allergic state or a viral infection
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the dripping of discharges from the postnasal region into the pharynx due to hypersecretion of mucus in the nasal or nasopharyngeal mucosa or to chronic sinusitis.Medical dictionary. 2011.