Demi-glace Definition

dĕmē-glăs

demiglace

noun

A rich brown sauce made from beef stock that is cooked slowly with wine until reduced to half its original volume: it is served with meat or used as a base for other sauces.

Webster's New World

Alternative spelling of demiglace.

Wiktionary

Origin of Demi-glace

French demi- demi- (from demi half) (from Old French demi-) glace glaze, heavily reduced sauce (from Old French ice glacier)

From American Heritage Dictionary of the English Language, 5th Edition