Ardent liquors [or spirits]

What does Ardent liquors [or spirits] mean in American Law?

The definition of Ardent liquors [or spirits] in the law of the United States, as defined by the lexicographer Arthur Leff in his legal dictionary is:

Intoxicating drinks containing alcohol, primarily referring to distilled liquors, i.e., things like whiskey, rum, and gin rather than beer and wine.