1. located or occurring behind the nose or in the region behind the nasal cavity
Usage: medical/anatomical term
2. relating to or caused by the flow of mucus from the nasal passages down the back of the throat
Usage: medical term; commonly used in healthcare contexts

Examples

• She complained of postnasal drip that made her cough at night.
• The doctor examined the postnasal area to check for inflammation.
• Postnasal discharge can be a symptom of allergies or a cold.
• He was prescribed medication to relieve his postnasal congestion.
• Postnasal drip often worsens when lying down.