Meaning of the word "turn against" in English

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

turn against

US /tɜːrn əˈɡenst/
UK /tɜːn əˈɡenst/
"turn against" picture

Phrasal Verb

to become hostile to someone or something; to betray or oppose

Example:
After the scandal, many of his supporters turned against him.
The public might turn against the new policy if it causes too many problems.