the world > food and drink > drink > intoxicating liquor > types or qualities of intoxicating liquor > [adjective] > neat or undiluted (3)
Of alcoholic liquors: pure; unadulterated; spec. not mixed with water (or, in later use: soft drink, etc.); undiluted.
U.S. Of liquor: Neat, undiluted.
Of a material substance: Unmixed or unaccompanied with other matter. Esp. of strong drink. undiluted with water.