Invasion
Definition 1 of 4
Pro Tip 1/3
War Context
Use 'invasion' to describe military forces entering another country by force. The history book detailed the invasion of Normandy during World War II.
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Hostile Action
'Invasion' has a negative connotation, suggesting hostility and aggression. Residents fortified the town to defend against the enemy's invasion.
Pro Tip 3/3
Not Physical Only
Can also describe virtual or cultural influence deemed aggressive or unwelcome. Some see the widespread adoption of foreign customs as a cultural invasion.