intrusion

UK/ɪnˈtɹuːʒən/US/ɪnˈtɹuːʒən/

nounB2Common in everyday speech and writing · #5,282 of 15,258neutral

Other forms: intrusions

An intrusion is an unwelcome entry into a place or a private matter. An intrusion on her grief, an intrusion into privacy, forgive the intrusion.

In security it is the technical word for a break-in to a system, which is why software that watches for one is called intrusion detection. Forgive the intrusion is a polite formula for interrupting. In geology an intrusion is rock forced up into older rock.

Definitions of intrusion

1nounintrusionAn unwelcome entry into a place or a private matter.B2
“The actress called the photographers an intrusion into her private life.”

intrusion is an entry.

Where it comes from

Medieval Latin intrusio comes from intrudere, to thrust in — in, into, plus trudere, to push.

Proto-Indo-European
*trewd-
Latin
in-
Medieval Latin
intrūsiō
Old French
intrusion
Middle English
intrusioun
English, today
intrusion

From Middle English intrusioun, from Old French intrusion, from Medieval Latin intrūsiō, from intrūdō, from Latin in- + trūdō.

Etymology from Wiktionary, CC BY-SA

Practise this word

intrusion in the wild

Any intrusion activity or violation is typically either reported to an administrator or collected centrally using a security information and event management (SIEM) system.
Intrusion detection system
Some IDS products have the ability to respond to detected intrusions.
Intrusion detection system
One major issue with using HIDS is that it needs to be installed on each and every computer that needs protection from intrusions.
Host-based intrusion detection system
Saltwater intrusion can also be worsened by extreme events like hurricane storm surges.
Saltwater intrusion
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school.
Security alarm

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From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.

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