intrusion

noun in·tru·sion \ in-ˈtrü-zhən \
Updated on: 8 Dec 2017

Definition of intrusion

1 : the act of intruding or the state of being intruded; especially : the act of wrongfully entering upon, seizing, or taking possession of the property of another
2 : the forcible entry of molten rock or magma into or between other rock formations; also : the intruded magma

Recent Examples of intrusion from the Web

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

Origin and Etymology of intrusion

Middle English, from Anglo-French, from Medieval Latin intrusion-, intrusio, from Latin intrudere


INTRUSION Defined for Kids

intrusion

noun in·tru·sion \ in-ˈtrü-zhən \

Definition of intrusion for Students

1 : the act of going or forcing in without being wanted
2 : something that goes in or interferes without being wanted
  • The phone call was an unwelcome intrusion.

Law Dictionary

intrusion

noun in·tru·sion \ in-ˈtrü-zhən \

legal Definition of intrusion

1 a : the entry at common law of a stranger after a particular estate of freehold is determined before the person who holds it in remainder or reversion has taken possession
b : the act of wrongfully entering upon, seizing, or taking possession of the property of another
2 : a trespassing on or encroachment upon something (as a right)
  • the Fourth Amendment demands that the showing of justification match the degree of intrusion
  • Berger v. New York, 388 U.S. 41 (1968)


Seen and Heard

What made you want to look up intrusion? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

of very fine texture or delicate form

Get Word of the Day daily email!

Test Your Vocabulary

Star Wars Words Quiz

  • cu-jedi-training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!