1. sudden attacks or invasions into enemy territory
Usage: military
2. unwelcome intrusions or encroachments into a place or situation

Examples

• The border guards reported several incursions by enemy forces.
• Military incursions into the neutral zone violated the peace treaty.
• The company faced incursions from competitors trying to steal market share.
• Wildlife officials were concerned about human incursions into protected habitats.
• The rebels launched nighttime incursions against government outposts.
• Technology incursions into traditional industries have disrupted many businesses.