Falernum (pronounced fə-LUR-nəm) is either an 11% ABV syrup liqueur or a nonalcoholic syrup from the Caribbean. It is best known for its use in tropical drinks. It contains flavors of ginger, lime, and almond, and frequently cloves or allspice. It may be thought of as a spicier version of orgeat syrup.

The form can be alcoholic (syrup liqueur) or nonalcoholic (syrup). Versions with alcohol are generally lower in proof (≅15 ABV), adding rum and emphasizing the clove, ginger, or allspice flavoring aspects for use in mixing cocktails, typically tropical or tiki drinks. It is also enjoyed on the rocks.