1. to enter a place by force in order to attack or conquer it
Usage: military context
2. to enter a place in large numbers, especially when unwelcome
3. to interfere with someone’s privacy or personal space

Examples

• The army invades the neighboring country at dawn.
• Tourists invade the small town every summer.
• She felt that the reporter invades her privacy.
• The smell of smoke invades the entire building.
• Cancer invades healthy tissue if left untreated.
• Weeds invade the garden when not properly maintained.