abbreviation or noun
\ ˌdē-(ˌ)yü-ˈī How to pronounce DUI (audio) \
plural DUIs

Definition of DUI

1 US : the act or crime of driving a vehicle while affected by alcohol or drugs was arrested for DUI a DUI case
2 US : an arrest or conviction for driving under the influence … the reason he was in prison is that a few DUIs caught up with him …— Barbara Ehrenreich
3 US : a person who is arrested for or convicted of driving under the influence a convicted DUI

First Known Use of DUI

1969, in the meaning defined at sense 1

History and Etymology for DUI

driving under the influence

Keep scrolling for more

Learn More about DUI

Statistics for DUI

Cite this Entry

“DUI.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/DUI. Accessed 26 Nov. 2020.

Keep scrolling for more

More Definitions for DUI

Legal Definition of DUI

driving under the influence

Comments on DUI

What made you want to look up DUI? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!