invasion

Definitions:

The entrance of a hostile army into a country for the purpose of conquest; an attack on the rights of another.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
See invade.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
A hostile entrance into the possessions of another; an attack on the territory of another; infringement or violation; attack of a disease. See Invade.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)
Hostile entrance; attack; encroachment.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
The act of entering a country with a hostile army; entrance forced by an enemy's army; encroachment.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
The act of invading: an attack: an incursion: an attack on the rights of another: an encroachment: a violation.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)

Usage examples:

Pitt did not leave his post for long, except when high winds made an invasion impossible.
- William Pitt and the Great War by John Holland Rose
The exile of the Guaninis from the islands, must allude to another revolution and perhaps invasion
- The American Nations, Vol. I. by C. S. Rafinesque
The war of the invasion was over, and the children of Israel had quiet possession of the country when the Book of Joshua was written.
- The Bible: what it is by Charles Bradlaugh