Invasion

n. [ L. invasio: cf. F. invasion. See Invade. ] [ 1913 Webster ]

1. The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass. [ 1913 Webster ]

2. A warlike or hostile entrance into the possessions or domains of another; the incursion of an army for conquest or plunder. [ 1913 Webster ]

3. The incoming or first attack of anything hurtful or pernicious; as, the invasion of a disease.

Syn. -- Invasion, Irruption, Inroad. Invasion is the generic term, denoting a forcible entrance into a foreign country. Incursion signifies a hasty and sudden invasion. Irruption denotes particularly violent invasion. Inroad is entry by some unusual way involving trespass and injury. [ 1913 Webster ]