I. ən-ˈtil, -ˈtel; ˈən-ˌ, -t ə l preposition
Etymology: Middle English, from un- (probably from Old Norse * und up to; akin to Old Norse unz up to, until, Old High German unt, Old English ende end) + til, till till
Date: 13th century
1. chiefly Scottish : to
2. — used as a function word to indicate continuance (as of an action or condition) to a specified time
stayed until morning
3. : before 2
not available until tomorrow
we don't open until ten
II. conjunction
Date: 14th century
: up to the time that : up to such time as
play continued until it got dark
never able to relax until he took up fishing
ran until she was breathless