Main Entry: in·va·sion

Pronunciation: \in-ˈvā-zhən\

Function: noun

Etymology: Middle English invasioune, from Anglo-French invasion, from Late Latin invasion-, invasio, from Latin invadere to invade

Date: 15th century

1 : an act of invading; especially : incursion of an army for conquest or plunder
2 : the incoming or spread of something usually hurtful