Flavoured alcoholic liquor

• Drink flavoring
• Cocktail flavoring
• Pink Gin ingredient
• Dry, sharp-tasting ales
• Old-fashioned ingredient
• Ingredient in a classic gin martini

Wiktionary Word definitions in Wiktionary
n. A liquid used in mixed drinks or as a tonic into which bitter herbs have been steeped (it can also be found in powdered form for adding to mixed drinks).

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Bitters \Bit"ters\, n. pl. A liquor, generally spirituous in which a bitter herb, leaf, or root is steeped.

WordNet Word definitions in WordNet
n. alcoholic liquor flavored with bitter herbs and roots