Invade is a verb with a few related but distinctclearly different from one another meanings. It can mean to enter and take control of a place by force, to spread into something harmful, or to intrudeto go into a place or situation without welcome or permission into someone’s space, privacy, or territoryan area of land controlled or claimed by a group or country.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /ɪnˈveɪd/
Easy pronunciation: in-VAYD (approximate spelling).
Stress: Stress the second syllable.
Use this for the military meaning: to enter a place by force to take control of it.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.
Invade Meaning
to attack and enter a country, area, or place by force
Part of speech: verb
Definition: to enter a place by force in order to take control of it
Example: The army invaded the city at dawn.
Synonyms for this meaning:
- occupy — Can work in some military contexts, but it is closer to taking control than to the act of invading.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.
Other Meanings of Invade
Meaning 2
to get into someone’s space, privacy, or rights in an unwanted way
Part of speech: verb
Definition: to intrude upon, infringe, encroach on, violate
Example: I felt like I was invading their privacy by reading the message.
Synonyms for this meaning:
- encroach upon — Matches the sense of gradually entering or interfering with someone else's space or rights.
- intrude on — A natural substitute when someone or something interferes where it is not wanted.
- obtrude upon — Works, but is more formal and less common.
Meaning 3
to spread into a place or onto a living host in large numbers
Part of speech: verb
Definition: occupy in large numbers or live on a host
Example: Mosquitoes invaded the campsite after sunset.
Synonyms for this meaning:
- infest — A strong synonym when insects or pests spread somewhere in large numbers.
- overrun — Works when something spreads so much that it takes over an area.
Meaning 4
to spread into part of the body or tissue in a harmful way
Part of speech: verb
Definition: penetrate or assault, in a harmful or injurious way
Example: The tumor invaded nearby tissue.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.
Invade Synonyms
Similar Meaning
- encroach upon
- intrude on
military force into a territory
- occupy
spread into an area or host in large numbers
- infest
- overrun
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.
Common Mistakes
- Do not use invade for a mild visit or ordinary entry; it implies unwanted or forceful movement.
- Do not mix up invade with occupy: invade is the act of entering by force, while occupy is taking and holding control.
- Do not use the body/tissue sense when you mean privacy or territory.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does invade mean in simple English?
Invade means to enter something forcefully or unwantedly. It can refer to armies entering a place, pests spreading somewhere, or something unwanted getting into a private space.
What are the most common synonyms of invade?
For the privacy or territory sense, common synonyms are encroach upon and intrude on. For the military sense, occupy can sometimes fit. For pests or large numbers, infest and overrun are the closest matches.
Is invade always about war?
No. It can also mean to intrude on someone’s privacy, to spread into an area in large numbers, or to move into the body in a harmful way.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-09. AI assessment; not a guarantee of accuracy.