Meaning of the word "dead and buried" in English

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

dead and buried

US /dɛd ænd ˈbɛrid/
UK /dɛd ænd ˈbɛrid/

Idiom

completely finished, ended, or forgotten; no longer existing or relevant

Example:
That old business idea is completely dead and buried.
Their hopes of winning the championship are dead and buried after that loss.