noun Download 🔗Share An aircraft, such as a dirigible or balloon, that derives its lift from buoyancy rather than from wings or rotors. Examples : "The annual town fair always features a giant aerostat, slowly floating above the crowds and advertising local businesses. " vehicle technology nautical space military Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A moored balloon flown in a semi-permanent manner, such as a border patrol monitoring balloon affixed at 18,000 feet (~6 km). Examples : "The border patrol used an aerostat to monitor activity along the remote frontier. " technology military vehicle government space machine device Chat with AIVocabulary GamePractice Reading