- (n.) The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass.
- (n.) The incoming or first attack of anything hurtful or pernicious; as, the invasion of a disease.
- (n.) A warlike or hostile entrance into the possessions or domains of another; the incursion of an army for conquest or plunder.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). invasion. Retrieved September 25, 2026, from http://smartdefine.org/invasion/definitions/2023389 |
| Chicago | Webster's. 2011. "invasion" http://smartdefine.org/invasion/definitions/2023389 (accessed September 25, 2026). |
| Harvard | Webster's 2011, invasion, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/invasion/definitions/2023389>. |
| MLA | Webster's. "invasion" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/invasion/definitions/2023389> |