Definition

1. Noun:
   • An act of entering a place or situation without permission or welcome: The core meaning refers to an unwelcome or unauthorized entry into a physical space, a conversation, or a state of affairs.
   • Something that intrudes or enters in this way: The word can also refer to the thing or person that makes the unwelcome entry.
   • Geology: The process of molten rock forcing its way into surrounding rock: A specific scientific term for the emplacement of magma into pre-existing rock formations.

Examples of Usage

• General Use:

  • The loud noise was an intrusion on our peaceful evening.
  • Security cameras are installed to prevent intrusion into the building.
  • She felt his questions were an intrusion on her privacy.

• Geological Use:

  • The granite was formed by the slow cooling of a large magma intrusion.
  • Geologists study igneous intrusions to understand volcanic activity.

Advanced Usage

• "to constitute an intrusion": to be considered or act as an unwelcome entry.

  • The journalist's persistent calls constituted an intrusion into the family's grief.

• "digital intrusion": unauthorized access into computer systems or data.

  • The company suffered a major data breach due to a cyber intrusion.

Variants and Related Words

• Intrude (verb): to enter or force oneself upon a situation without invitation.
  • I don't want to intrude on your meeting.
• Intrusive (adjective): tending to intrude; characterized by intrusion.
  • The paparazzi's behavior was highly intrusive.
• Intruder (noun): a person who intrudes, especially into a building.
  • The alarm sounded when an intruder was detected.

Synonyms

• Encroachment: a gradual advance beyond usual or acceptable limits.
• Trespass: entry to a person's land or property without permission.
• Infringement: the action of breaking a law, agreement, or right.
• Incursion: a sudden invasion or attack, especially into territory.

Related Phrases

• Unwelcome intrusion: emphasizes the negative, imposed nature of the entry.
  • The telemarketing call was an unwelcome intrusion during dinner.
• Peaceful intrusion: a rare, sometimes ironic use for a non-violent but still unauthorized entry.
  • The overgrown garden was a peaceful intrusion into the urban landscape.

Idioms

• An intrusion on one's time/space/privacy: a common collocation highlighting what is being violated.
  • Working from home helps reduce intrusions on one's time from office chatter.

Noun

1. entry to another's property without right or permission
2. rock produced by an intrusive process
3. the forcing of molten rock into fissures or between strata of an earlier rock formation
4. entrance by force or without permission or welcome
5. any entry into an area not previously occupied
   • an invasion of tourists
   • an invasion of locusts