Definition: march aggressively into another's territory by military force for the purposes of conquest and occupation
Usage: Hitler invaded Poland on September 1, 1939
Main entry: invade
Definition: penetrate or assault, in a harmful or injurious way
Usage: The cancer had invaded her lungs
Main entry: obtrude upon, intrude on, invade, encroach upon
Definition: to intrude upon, infringe, encroach on, violate
Usage: This new colleague invades my territory; The neighbors intrude on your privacy
Main entry: infest, invade, overrun
Definition: occupy in large numbers or live on a host
Usage: the Kudzu plant infests much of the South and is spreading to the North