• (n.) The science of weighing air; aerostatics. • (n.) Aerial navigation; the art of raising and guiding balloons in the air. • (n.) That part of aeronautics that deals with passive balloons.
A`ër·os·ta'tion noun [ Confer French aérostation the art of using aërostats .] 1. Aërial navigation; the art of raising and guiding balloons in the air. 2. The science of weighing air; aërostatics. [ Obsolete]A`ër·o·sta'tion noun That part of aëronautics that deals with passive balloons. 
the science or art of operating aerostats.