driv·ing under the in·flu·ence: the offense of operating a motor vehicle while intoxicated by drugs or esp. alcohol – called also driving while intoxicated, drunk driving, drunken driving;
◇ Most states specify by statute a level of alcohol in the blood that creates a presumption that the person is under the influence of alcohol. The blood alcohol content is required to be .10 percent in most states.
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.