Definition of Fess

Noun: fess fes

(heraldry) an ordinary consisting of a broad horizontal band across a shield
- fesse

Verb: fess fes

Admit or acknowledge a wrongdoing or error
"the writer of the anonymous letter fessed up after they identified his handwriting";
- make a clean breast of, own up, fess up, cop [N. Amer], own, come clean, cop to [N. Amer]