Difference between Ancient and Antediluvian

Ancient

Part of speech: adjective

Definition: Having lasted from a remote period; having been of long duration; of great age; very old. Existent or occurring in time long past, usually in remote ages; belonging to or associated with antiquity; old, as opposed to modern.

Part of speech: noun

Definition: A person who is very old or who lived in ancient times. A flag, banner, standard or ensign.

Example sentence: When we look back at the Mayans or ancient Egypt, we look at their art.

Antediluvian

Part of speech: noun

Definition: One who lived prior to Noah's Flood.

Part of speech: adjective

Definition: Extremely ancient or antiquated; old; prehistoric.Supremely dated.Pertaining or belonging to the time period prior to a great or destructive flood or delugePertaining or belonging to the time prior to Noah's Flood.