Ballooning n. : The art or practice of managing balloons or voyaging in them.

Ballooning n. : The process of temporarily raising the value of a stock, as by fictitious sales.

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Taxonomy
balloon, gas, aircraft, hot air balloon, Gas balloons, hydrogen, pressure, gas balloon, Unpowered, military, flight, passengers, envelope, hot air, gas generators, altitude, Observation balloons, 1863.

Defination from the web:
Ballooning was established at Chatham, Medway, Kent. ... Royal Engineers Museum Early British Military Ballooning (1863) Balloon fabrics made of Goldbeater's skins by Chollet, L. Technical Section of Aeronautics. ...