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fess 1also fesse (fĕs)
A wide horizontal band forming the middle section of an escutcheon.
[Middle English fesse, from Old French, from Latin fascia, band.]
intr.v. fessed, fess·ing, fess·es Informal
To admit to something; confess, often used with up: "won't fess up to being even vaguely liberal" (Jonathan Alter).
[Short for confess.]
informal chiefly (foll by: up) US to make a confession
[C19: shortened from confess]
a wide horizontal band across the center of a heraldic field.
[1350–1400; Middle English fesse < Anglo-French « Latin fascia fascia]
Informal. fess up, to confess or concede.
[1830–40; aph. variant of confess]