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Definition of Invasion
1. Noun. The act of invading; the act of an army that invades for conquest or plunder.
2. Noun. Any entry into an area not previously occupied. "An invasion of locusts"
Exact synonyms: Encroachment, Intrusion
Generic synonyms: Entering, Entrance
Derivative terms: Encroach, Invade, Invade
Generic synonyms: Entering, Entrance
Derivative terms: Encroach, Invade, Invade
3. Noun. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body. "The tumor's invasion of surrounding structures"
Category relationships: Medical Specialty, Medicine
Generic synonyms: Spread, Spreading
Derivative terms: Invade
Generic synonyms: Spread, Spreading
Derivative terms: Invade
Definition of Invasion
1. n. The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass.
Definition of Invasion
1. the act of invading [n -S] : INVASIVE [adj]
Medical Definition of Invasion
1. A term that should be used with caution, although most cell biologists would follow Abercrombie in meaning the movement of one cell type into a territory normally occupied by a different cell type, some pathologists might not agree. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)