Automobile emissions testing is required in all or part of 33 states to help maintain the federal air quality standard. Areas that were in moderate nonattainment or worse for ozone in 1990 are included in Ohio's E-Check program. These areas include the metropolitan statistical areas of Cleveland and Akron.
Freebase(0.00 / 0 votes)Rate this definition: Alcohol proof. Alcohol proof is a measure of how much alcohol is contained in an alcoholic beverage. The term was originally used in the United Kingdom and was defined as 7/4 times the alcohol by volume.
What does alcohol proof mean? That pirate may not care what the proof of what he's swilling is, but we do. If you've ever examined a bottle of alcohol (and who hasn't?), you've probably noticed that there are two measures of alcoholic content printed on it. One is the alcohol percentage by volume, and the other is the proof. You might also have noticed that (in the United States, anyway) the proof is always twice the percentage. So why do we need both numbers if one is always twice the other -- isn't that a little redundant?