1. the portion of the atmosphere controlled by a country above its territory
Usage: aviation; legal
2. the space available to aircraft in a particular area
Usage: aviation
3. the three-dimensional space above a particular area

Examples

• The military jet violated foreign airspace during its mission.
• Air traffic controllers manage the busy airspace around major airports.
• Commercial airlines must request permission to enter restricted airspace.
• The country closed its airspace to all international flights.
• Drones are not allowed in this airspace without proper authorization.
• The pilot reported congested airspace over the metropolitan area.
• New regulations will affect how airspace is divided among airlines.