bib ‧ li ‧ cal /ˈbɪblɪk ə l/ BrE AmE adjective [usually before noun]
1 . relating to or written in the Bible:
The disease dates back to biblical times.
biblical story/text/reference
the biblical story of Noah
2 . of biblical proportions a bad situation or event that is of biblical proportions is very great or severe:
This could result in an environmental disaster of biblical proportions.