Definition of invasion
1 : an act of invading; especially : incursion of an army for conquest or plunder
2 : the incoming or spread of something usually hurtful
Examples of invasion in a sentence
The enemy launched an invasion.
The people live under a constant threat of invasion.
The town is gearing up for the annual tourist invasion.
protecting the house from insect invasion
Origin and Etymology of invasion
Middle English invasioune, from Anglo-French invasion, from Late Latin invasion-, invasio, from Latin invadere to invade
First Known Use: 15th century
INVASION Defined for Kids
Definition of invasion for Students
: an act of invading
Medical Definition of invasion
: the act of invading: asa: the penetration of the body of a host by a microorganismb: the spread and multiplication of a pathogenic microorganism or of malignant cells in the body of a host
Legal Definition of invasion
: the act of or an instance of invading
Seen and Heard
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