preposition

1. Until; to, up to; as late as (a given time).

   “I have to work till eight o'clock tonight.”

2. To, up to (physically).

   “They led him till his tent”

3. To make it possible that.

conjunction

1. Until, until the time that.

   “Maybe you can, maybe you can't: you won't know till you try.”

Synonyms: 'til, til, until