Definition of: until

(un·til′) prep.
1. Up to the time of; till: We will wait until midnight.
2. Before: used with a negative: The music doesn't begin until nine.
3. Scot. & Brit. Dial. Unto.
—conj.
1. To the time when: until I die.
2. To the place or degree that: Walk east until you reach the river.
3. Before: with a negative: He couldn't leave until the car came for him. [ME untill <und- up to, as far as + TILL]