Meaning of the word "not until" in English

What does "not until" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

not until

US /nɑt ənˈtɪl/
UK /nɒt ənˈtɪl/

Phrase

used to emphasize that something will not happen before a particular time or event

Example:
I won't leave not until you tell me the truth.
The store opens not until 10 AM.