B1
continuing to happen before a particular time or event and then stopping
Dictionary examples:
I'll keep telling jokes until someone finally laughs or falls asleep. (0.0)
I'll keep studying English until I dream in Shakespeare's language. (0.0)
I'll watch funny cat videos until I start meowing in my sleep. (0.0)
We're going to stay until the job is done. (18.0)
I waited until they left before I started clearing up. (38.3)
Whisk the egg whites until they look white and fluffy. (83.6)