Home › Words › O › overshadeovershadeovershade means to cast a shadow over, to overshadow.EtymologyFrom over- + shade.verbTo cast a shadow over, to overshadow.e.g.“as a veil, / Waved and o'ershading her wan cheek, appears / Her streaming hair [...].” — 1819, Lord Byron, Don Juan, section I:Definitions & examples from Wiktionary (CC BY-SA 3.0).