up to the time that or when; till

He read until his guests arrived.

before (usually used in negative constructions)

They did not come until the meeting was half over.

onward to or till (a specified time or occurrence)

She worked until 6 p.m.

before (usually used in negative constructions)

He did not go until night.

Scot. and North England . to; unto.

preposition

as far as , before , before the coming , continuously , down to , in advance of , in expectation , prior to , till , to , up till , up to