Of or belonging to the air; aerial; (hence) ethereal, spiritual, incorporeal, insubstantial. Also: open to the air. Cf. airy, adj.

Dwelling, flying, or moving in the air, above the earth; occurring or taking place in the air; (spec. of birds or bats) spending much of the time…

That courses: see the verb.

Of things: Passing rapidly through the air or space, as if by flight; floating lightly in the air.

That flies or flits about; spec. in Pathology of a variety of itch.

That floats (in various senses of the verb). floating leaf n. (see quot. 1793).

Of or belonging to the air or atmosphere; = aerial, adj. in various senses.

Flitting, flying, or constantly moving about.