2. [syn: invasion, encroachment, intrusion]
3. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body;
- Example: "the tumor's invasion of surrounding structures"
The Collaborative International Dictionary of English v.0.48:
Invasion \In*va"sion\, n. [L. invasio: cf. F. invasion. See
1. The act of invading; the act of encroaching upon the
rights or possessions of another; encroachment; trespass.
2. A warlike or hostile entrance into the possessions or
domains of another; the incursion of an army for conquest
3. The incoming or first attack of anything hurtful or
pernicious; as, the invasion of a disease.
Syn: Invasion, Irruption, Inroad.
Usage: 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.
WordNet (r) 3.0 (2006):
n 1: the act of invading; the act of an army that invades for
conquest or plunder
2: any entry into an area not previously occupied; "an invasion
of tourists"; "an invasion of locusts" [syn: invasion,
3: (pathology) the spread of pathogenic microorganisms or
malignant cells to new sites in the body; "the tumor's
invasion of surrounding structures"
Moby Thesaurus II by Grady Ward, 1.0:
67 Moby Thesaurus words for "invasion":
adoption, aggression, air attack, air raid, air strike,
appropriation, arrogation, assault, assumption, attack, blitzkrieg,
boarding, breach, drive, encroachment, entrance, entrenchment,
escalade, fire raid, foray, impingement, imposition, incursion,
infestation, infiltration, influx, infraction, infringement,
injection, inroad, insinuation, interference, interjection,
interloping, interposition, interposure, interruption,
intervention, intrusion, irruption, lousiness, obtrusion, offense,
offensive, onslaught, overrunning, overspreading, overswarming,
plague, playing God, raid, ravage, razzia, saturation raid,
scaling, seizure, shuttle raid, storming, swarm, swarming, teeming,
transgression, trespass, trespassing, unlawful entry, usurpation,
Bouvier's Law Dictionary, Revised 6th Ed (1856):
INVASION. The entry of a country by a public enemy, making war.
2. The Constitution of the United States, art. 1, s. 8, gives power to
congress "to provide for calling the militia to execute the laws of the
Union, suppress insurrections, and repel invasions." Vide Insurrection.