Of or belonging to the time before the biblical Flood; ridiculously old-fashioned or out of date.
From Latin 'ante' (before) + 'diluvium' (flood/deluge). Originally meant 'before Noah's Flood.' Now used for anything comically outdated — your grandpa's phone is antediluvian.
Literally 'before the FLOOD!' Originally about the time before Noah, now it means SO old it makes dinosaurs look modern! When your teacher uses an overhead projector — ANTEDILUVIAN! 🦕📽️
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