Meaning "half-dry" usually pertaining to Champagne and relating to sweetness. Demi-sec sparkling wines are usually slightly sweet to medium sweet. - so half dry, half sweet.
(deh-mee seck) Literally this French term means "half-dry." In practice it refers to the sweetest style of Champagne a house will make.
"Sec" is French for "dry." Demi-sec means "half-dry." When applied to sparkling wines, the term actually indicates a relatively sweet wine-sweeter than extra dry-which is appropriate with dessert.