An intrusion is a deliberate move into someone else’s territory — either literal or figurative. When your sister interrupts your conversation with that girl from math class, that’s an intrusion. If someone breaks into your home, that’s also an intrusion.

First used in the late 14th century, the noun intrusion derives from the Latin word intrudere, which combines the prefix in-, meaning “in,” and trudere, meaning “to thrust, push.” If someone reads your diary, that’s considered an intrusion of privacy. Ordering a Muslim woman to take off her veil would be considered an intrusion on religious beliefs. You may remember intrusion used in science class to describe molten rock that forms in an earlier rock formation.

Definitions of intrusion
  1. noun

    entrance by force or without permission or welcome

    see moresee less

    type of:

    entering, entrance, entry, incoming, ingress

    the act of entering

  2. noun

    entry to another’s property without right or permission

    encroachment, trespass, usurpation, violation
    see moresee less



    an encroachment or intrusion
    type of:

    actus reus, misconduct, wrongdoing, wrongful conduct

    activity that transgresses moral or civil law

  3. noun

    any entry into an area not previously occupied

    encroachment, invasion
    see moresee less

    type of:

    entering, entrance

    a movement into or inward

  4. noun

    the forcing of molten rock into fissures or between strata of an earlier rock formation

    see moresee less

    type of:

    geologic process, geological process

    (geology) a natural process whereby geological features are modified

  5. noun

    rock produced by an intrusive process

    see moresee less

    type of:

    rock, stone

    a lump or mass of hard consolidated mineral matter

Word Family