(aviation, nautical, historical) A ship used to support carry a balloon or dirigeable, and support its operation; particularly observation balloon operations

An inflatable draught excluder for a chimney.

Alternative form of balloon tire

plural of balloon tyre

(cycling) A wide, large-volume, low-pressure tire associated with cruiser bicycles.

plural of balloon tire

Alternative spelling of hot-air balloon

A balloon-shaped aircraft whose bag is inflated with hot air; it carries passengers and crew in a gondola slung underneath.

(meteorology) A method of winds-aloft observation, temperature, and relative humidity of the upper that is, the determination of wind speeds and air and to automatically transmit that directions in the atmosphere above a station. This is done by reading the elevation and azimuth angles of a theodolite (instrument) observation while visually tracking a pilot balloon. The ascension rate of the balloon is approximately determined by careful inflation to a given total lift. After release from the ground, periodic readings (usually at one-minute intervals) of elevation and azimuth angles of the balloon are recorded. These data are transferred to a winds-aloft plotting board, and wind speed and direction at selected levels are calculated by trigonometric methods.

(idiomatic) Something exciting or risky begins.