the degree to which a perfume’s fragrance lingers in the air when worn
French, literally ‘wake, trail’
Sillage : Perfume Vocabulary & Fragrance Terms
Sillage (pronounced as see-yazh) is a term used to describe a scented trail left by the fragrance wearer. It comes from the French word for “wake,” as in the trail left in the sky by an airplane or on the water by a boat. Sillage defines how fragrance diffuses around the wearer, and a strong sillage means that a fragrance projects well.