1. To express a time limit:
* I will wait until 6pm for the train to arrive.
* I will work until I finish the project.
2. To express a condition or purpose:
* Please finish your vegetables until you can have dessert.
3. To express a point of time or event:
* We will stay here until the rain stops.
4. To express a state or situation:
* She was in pain until the doctor gave her medicine.
5. To express an idea that something will not happen before a certain time, point, or event:
* I was not worried until I heard your scream.