Other forms: flosses; flossing; flossed
Floss is what you use to clean between your teeth. Dental floss is a strong, thick thread that can reach small pieces of food in tight spaces.
Your dentist will be happy with you if you really do use floss every day — and to do this is to floss. Other types of floss are soft threads with different uses: some floss is made for stitching or embroidering designs on fabric, and the strands of silk spun by a silkworm are also floss. The origin of this word is uncertain, but one guess connects it to floche, "tuft of wool" in French.