Definition of antediluvially in English:

antediluvially

adverb

rare
  • In times before the Flood described in the biblical book of Genesis, or (later) before any widespread flooding.

Origin

Early 19th century; earliest use found in Thomas Lovell Beddoes (1803–1849), poet. From antediluvial + -ly.

Pronunciation

antediluvially

/ˌantɪdɪˈluːvɪəli/