invasion

noun in·va·sion \ in-ˈvā-zhən \

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

  1. The enemy launched an invasion.

  2. The people live under a constant threat of invasion.

  3. The town is gearing up for the annual tourist invasion.

  4. protecting the house from insect invasion

Recent Examples of invasion from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'invasion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of invasion

Middle English invasioune, from Anglo-French invasion, from Late Latin invasion-, invasio, from Latin invadere to invade



INVASION Defined for Kids

invasion

noun in·va·sion \ in-ˈvā-zhən \

Definition of invasion for Students

:an act of invading

Medical Dictionary

invasion

noun in·va·sion \ in-ˈvā-zhən \

medical Definition of invasion

:the act of invading: as
a :the penetration of the body of a host by a microorganism
b :the spread and multiplication of a pathogenic microorganism or of malignant cells in the body of a host

Law Dictionary

invasion

noun in·va·sion \ in-ˈvā-zhən \

legal Definition of invasion

:the act of or an instance of invading


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