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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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


The movement of one material into a porous reservoir area that has been occupied by another material.
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Not in my name do you invade any more Muslim nations in the name of making America safe.
The last war in the Gulf was above all Saddam Hussein's war.(32) He decided to invade Kuwait, he played the brinkmanship game, he misread the political realities of the New World Order, he over-estimated his military capabilities and certainly underestimated American military might and its determination to use force.
A few centuries from now, should supposed warming trends continue, Labrador black spruce may invade the shores of Baffin Island and Georgia baldcypress may dip their knobby knees in Long Island Sound.
'Our father gave us the land and we did not invade it as he is claiming here,' said Evans.
Earlier today, Swamy defended his comments by saying that India should invade the Maldives "if" there is rigging in their elections.
Q WHY did Yugoslavia try to invade Italy in May 1945?
Did the learned gentleman not read the previous day's press where we were informed of the 1,040 ways the system can invade our privacy?
The leader of a mainland European country wanted to invade Great Britain.
decided to invade Iraq in 2003 to overthrow Saddam Hussein, it helps to go back 13 years, to the war that added "Operation Desert Storm" and "the mother of all battles" to the American vernacular.
Wolfowitz persuaded Bush to invade Iraq, insisting US troops would be welcomed.
For example, most cold viruses only invade cells in the nose and throat of humans.