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Invasion

   Also found in: Dictionary/thesaurus, Medical, Legal, Idioms, Wikipedia 0.02 sec.
invasion
1. Pathol the spread of cancer from its point of origin into surrounding tissues
2. Ecology the movement of plants to a new area or to an area to which they are not native

invasion [in′vā·zhən]
(geology)
The movement of one material into a porous reservoir area that has been occupied by another material.
(medicine)
The phase of an infectious disease during which the pathogen multiplies and is distributed; precedes signs and symptoms.
The process by which microorganisms enter the body.

Invasion 

(infestation), the infection of man, animals, and plants by animal parasites.

Invasion may be active, as when a parasite attacks or penetrates the body of the host through injured or intact skin, or passive, brought into the body with water or food.



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It might even win battles, and yet your standing army are mercenaries, and no great nation, from the days of Babylon, has resisted invasion or held an empire by her mercenaries.
Now, in the midst of these intestine disquiets, we are threatened with an invasion from the island of Blefuscu, which is the other great empire of the universe, almost as large and powerful as this of his majesty.
For if it had been defended by proper valour, as are Germany, Spain, and France, either this invasion would not have made the great changes it has made or it would not have come at all.
 
 
 
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