A more thorough explanation:

Driving under the influence (DUI) is when someone operates a motor vehicle while they are physically or mentally impaired, especially after consuming alcohol or drugs. It is a serious offense that can result in fines, license suspension, and even jail time.

Some other terms for DUI include:

• Driving while ability-impaired (DWAI)
• Driving under the influence of liquor (DUIL)
• Driving while intoxicated (DWI)
• Operating under the influence (OUI)
• Operating while intoxicated (OWI)
• Operating a motor vehicle while intoxicated (OMVI)
• Operating a motor vehicle under the influence (OMVUI)

While the specific laws and penalties for DUI vary by state and country, it is generally considered a lesser offense than driving while intoxicated (DWI). However, in some places, the two terms are used interchangeably.

For example, if someone is pulled over by the police and they have been drinking, they may be asked to take a breathalyzer test to determine their blood alcohol content (BAC). If their BAC is above the legal limit, they could be charged with DUI or DWI, depending on the jurisdiction.

Another example is if someone is caught driving erratically and is found to have drugs in their system. They could be charged with DUI, even if their BAC is below the legal limit.

These examples illustrate how DUI is a serious offense that can have severe consequences for both the driver and others on the road. It is important to never drink or use drugs before driving and to always have a designated driver or use alternative transportation.