Definition of DUI noun from the Oxford Advanced American Dictionary

 

DUI

 noun
noun
NAmE//ˌdi yu ˈaɪ//
 
[uncountable, countable]
 
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the crime of driving a vehicle after drinking too much alcohol. It is the abbreviation fordriving under the influenceand is a less serious crime than DWI (= driving while intoxicated).
See the Oxford Advanced Learner's Dictionary entry: DUI