The excess mucus production that triggers postnasal drip has a number of possible causes, including: 1  Colds. 2  Flu. 3  Allergies (called allergic postnasal drip). 4  Sinus infection or sinusitis (inflammation of the sinuses). 5  Object stuck in the nose (more common in children).
1. classical music-traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste. classical, serious music. chamber music-serious music performed by a small group of musicians.
Definition of music. 1  1a : the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuityb : vocal, instrumental, or mechanical sounds having rhythm, melody, or harmony choral music piano music recorded music.