intrusion

An unwanted entry into a place or involvement in someone’s private life.

• The visit felt like an intrusion.
• They reported an intrusion into their home.
• She resented the constant intrusion of strangers into her private life.

How to use it: intrusion into something (The cameras were an intrusion into their privacy.)

Similar words: invasion, interference

Common phrases: unwelcome intrusion, intrusion into something

An entry into a computer or network by someone or something without permission.

• The system detected an intrusion.
• Hackers attempted an intrusion into the company network.
• New software protects our servers against intrusions.

How to use it: intrusion into something (An intrusion into the server exposed private files.)

Similar words: breach, unauthorized access

Common phrases: network intrusion, intrusion detection

Hot liquid rock entering existing rock, or the solid rock that it later becomes.

• The intrusion cooled underground.
• Magma formed an intrusion between older rock layers.
• Geologists mapped several granite intrusions in the valley.

Common phrases: igneous intrusion, granite intrusion