Meaning of the word "buy sth from" in English

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

buy sth from

US /baɪ sʌmθɪŋ frʌm/
UK /baɪ sʌmθɪŋ frɒm/

Phrasal Verb

to purchase something from a particular person, shop, or source

Example:
I need to buy some groceries from the supermarket.
Where did you buy that book from?