1. acts of entering a country or territory by force with an army in order to occupy or conquer it
2. unwelcome intrusions into someone’s domain, privacy, or personal space
3. the arrival or spread of something harmful in large numbers

Examples

• The history book described several invasions that changed the course of European civilization.
• Military strategists studied past invasions to understand successful tactics.
• She felt the constant phone calls were invasions of her privacy.
• The reporter’s questions seemed like invasions into the family’s personal grief.
• The farmer struggled with invasions of locusts that destroyed his crops.
• Invasions of non-native species can disrupt local ecosystems.
• The coastal town prepared for possible invasions during wartime.