(nautical) A large, light foresail sometimes used instead of a jib.

(meteorology) A small unmanned balloon whose ascent is followed by a theodolite to obtain data for the computation of the speed and direction of winds in the upper air.

(meteorology) a balloon that carries meteorological instruments aloft in order to measure, record and return data concerning atmospheric pressure, temperature and humidity

A small rubber or latex balloon, filled with water and used as an informal weapon

A comic graphic element used to enclose obscenities, oaths, and curses.

plural of balloon vine

weather balloon

(aeronautics, historical) A small balloon released into the sky to determine the direction and tendency of winds in the upper air before a manned ascent in a larger balloon; a ballon d'essai.

a club for ballooning enthusiasts

mail (usually for weight reasons in the form of a postcard) carrying the name of the sender by means of an unguided hydrogen- or helium-filled balloon.