Meaning of the word "by which" in English

What does "by which" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

by which

US /baɪ wɪtʃ/
UK /baɪ wɪtʃ/

Phrase

used to introduce a relative clause that specifies the means or method by which something is done

Example:
This is the process by which we achieve our goals.
The contract specifies the terms by which the agreement will be governed.