say it: flahs
floss is a noun and verb meaning "a soft loosely twisted thread used in embroidery". It carries 3 recorded senses.
a soft loosely twisted thread used in embroidery
a soft thread for cleaning the spaces between the teeth
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for floss come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.