1. postnasal - Noun
2. postnasal - Adjective
postnasal (not comparable)
Of, pertaining to, or located near the posterior of the nasal cavity.
postnasal (plural postnasals)
The posterior half of a divided nasal scale.
Allergies can lead to itchy and watery eyes, postnasal drip, coughing, and other symptoms. Source: Internet
Down and out through the nostrils, or down the throat where it is swallowed (aka postnasal drip). Source: Internet