/ɛr speɪs/ – Phrase
Definition: khoảng không, không phận, vùng trời.
A more thorough explanation: Air space refers to the portion of the atmosphere above a specific area that is considered to be under the control of a particular country or entity. It is the area above the ground or water surface that is subject to the jurisdiction and regulations of the governing authority, typically in relation to aviation and airspace management.
Example: The drone operator was fined for flying the drone in restricted air space near the airport.