INVASION

invasion

(noun) the act of invading; the act of an army that invades for conquest or plunder

invasion

(noun) (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body; “the tumor’s invasion of surrounding structures”

invasion, encroachment, intrusion

(noun) any entry into an area not previously occupied; “an invasion of tourists”; “an invasion of locusts”

Source: WordNet® 3.1

Etymology

Noun

invasion (countable and uncountable, plural invasions)

A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

The entry without consent of an individual or group into an area where they are not wanted.

(medicine) The spread of cancer cells, bacteries and such to the organism.

(surgery) The breaching of the skin barrier.

Source: Wiktionary

In*va"sion, n. Etym: [L. invasio: cf. F. invasion. See Invade.]

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 or plunder.

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.

Source: Webster’s Unabridged Dictionary 1913 Edition

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