overmorrow

[ oh-ver-mawr-oh, ‐mor-oh ]
/ ˌoʊ vərˈmɔr oʊ, ‐ˈmɒr oʊ /
Archaic.

noun

the day after tomorrow: I’ve heard that tomorrow and overmorrow may bring exceptionally high waves.

adverb

on the day after tomorrow: If we leave overmorrow, we should not miss a day of the festival.

Origin of overmorrow

First recorded in 1530–40; over- + morrow