Meaning of the word "hear something through the grapevine" in English

What does "hear something through the grapevine" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

hear something through the grapevine

US /hɪər ˈsʌmθɪŋ θruː ðə ˈɡreɪpvaɪn/
UK /hɪə ˈsʌmθɪŋ θruː ðə ˈɡreɪpvaɪn/

Idiom

to hear news or information through an informal network of communication, often unofficially or secretly

Example:
I heard through the grapevine that Sarah is getting married.
He heard through the grapevine about the company's new policy before the official announcement.