What is dry champagne?

Answer 1

Dry Champagne refers to the amount of sugar content, or sweetness, of the Champagne. The dry description can be misleading for sparkling wine. A still wine described as dry means the wine is not sweet. However, the opposite is true for Champagne which is labeled Dry for sweeter and Brut for less sweet.

Source: http://en.wikipedia.org/wiki/Champagne_%28wine%29

Source: The Widow Clicquot: The Story of a Champagne Empire and the Woman Who Ruled It

Answer 2

Whether referring to champagne, wine, sherry, etc.; dry refers to a lack of sweetness, and a more tart taste.

It, sometimes, also refer to a higher level of alcohol which makes the beverage feel "dry" in the mouth.

Answer 3

The French word for "dry" in the wine or champagne sense is "brut". I suspect that's the word you're looking for.

Answer 4

The driest category of champagne and other sparkling wines is brut. It is derived from the fat that it is brutally dry.