until

1. up to the time of; till (a specified time or occurrence): until payday
2. before (a specified time or occurrence): used with a negative: not until tomorrow
3. Scot. to or toward

conjunction

1. up to the time when or that: until you leave
2. to the point, degree, or place that: heat the water until it boils
3. before: used with a negative: not until he tells you