Definition

1. Noun:
   • The act of entering a place, area, or country by force, especially with an army: This is the primary meaning, referring to a military attack and occupation.
   • The entry or spread of something harmful or unwanted into a place where it is not normally found: This can refer to things like diseases, pests, or even large numbers of people arriving suddenly.
   • An intrusion or violation of something, such as privacy or rights: This meaning focuses on an unwelcome interference.

Examples of Usage

• Military Context:

  • The country prepared its defenses against a possible invasion from the north.
  • The history book detailed the Roman invasion of Britain.

• Medical/Biological Context:

  • The biopsy showed an invasion of cancerous cells into the healthy tissue.
  • Doctors work to prevent the bacterial invasion of the wound.

• General/Figurative Context:

  • The quiet town experienced an annual invasion of tourists every summer.
  • Filing personal details online can lead to an invasion of privacy.

Advanced Usage

• "An invasion of privacy": A common phrase describing a situation where someone's personal life or space is intruded upon without permission.

  • The journalist was accused of an invasion of privacy for publishing the photos.

• "Cultural invasion": Refers to the widespread influence of one culture on another, often seen as overwhelming or negative.

  • Some see the popularity of global fast-food chains as a form of cultural invasion.

Variants and Related Words

• Invade (verb): To enter by force in order to conquer or occupy; to enter in large numbers; to intrude upon.

  • The army decided to invade at dawn.
  • Fans invaded the pitch after the match.

• Invasive (adjective):

  • Tending to spread aggressively, especially in a medical context (e.g., invasive surgery).
  • Intruding on someone's space or privacy (e.g., invasive questions).
  • (Of plants or animals) spreading rapidly in a new environment and causing harm (e.g., an invasive species).

• Invader (noun): A person or group that invades.

  • The invaders were eventually driven from the city.

Synonyms

• Incursion: A sudden, brief, and often small-scale invasion or attack.
• Infiltration: The act of entering or gaining access gradually or secretly.
• Encroachment: A gradual advance beyond usual or acceptable limits.
• Occupation: The control of a country or area by a foreign military force.

Related Phrases

• "Force of invasion": The military strength used in an invasion.
• "Beachhead": A defended position on a beach taken from the enemy by landing forces, from which an attack can be launched (a key part of a military invasion).

Related Idioms

• "The calm before the invasion": A period of quiet or inactivity immediately before a major, disruptive event. (A variation of "the calm before the storm").
  • The empty streets felt like the calm before the invasion of festival-goers.

Noun

1. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body
   • the tumor's invasion of surrounding structures
2. any entry into an area not previously occupied
   • an invasion of tourists
   • an invasion of locusts
3. the act of invading; the act of an army that invades for conquest or plunder