Meaning of “till” - Learner’s Dictionary

till

preposition, conjunction us uk /tɪl/
I don't get my exam results till the end of June so I'll just have to sweat it out till then.They were out partying till five o'clock in the morning.They're building new offices, but they won't be ready till next year.At this rate we're not going to be there till midnight.I lay in till eleven o'clock this morning.

A2 until:

I lived with my parents till I was twenty.

(Definition of “till preposition, conjunction” from the Cambridge Learner’s Dictionary © Cambridge University Press)