Main Entry: in·vade

Pronunciation: \in-ˈvād\

Function: transitive verb

Inflected Form(s): in·vad·ed; in·vad·ing

1 : to enter and spread within either normally (as in development) or abnormally (as in infection) often with harmful effects <protect the body from invading viruses> <branches of a nerve invade the skin area>
2 : to affect injuriously and progressively <gangrene invades healthy tissue>

—in·vad·er \-ˈvād-ər\ noun