Meaning of the word immemorial in English

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

immemorial

US /ˌɪm.əˈmɔːr.i.əl/
UK /ˌɪm.əˈmɔː.ri.əl/

Adjective

existing or traditional for an extremely long time:

Example:
She said it was the immemorial custom of the residents to have a feast after the harvesting.