Meaning of “until” - Learner’s Dictionary

until

preposition, conjunction uk us /ənˈtɪl/ (also till)
HAPPEN THEN STOP

A1 continuing to happen before a particular time or event and then stopping:

The show will be on until the end of the month.
Whisk the egg whites until they look white and fluffy.
AS FAR AS

A2 as far as:

Carry on until you reach the traffic lights and turn right.
not until

B1 not before a particular time or event:

It doesn't open until 7.
We won't start until Jeanne arrives.

(Definition of “until” from the Cambridge Learner’s Dictionary © Cambridge University Press)