(dated) A box for holding cosmetic powder, with a puff for applying it.

plural of puff-box

(aviation) A pipe on a VTOL aircraft that expels compressed air in order to stabilize the craft.

plural of puff pipe

Disappearing suddenly.

Alternative form of powder puff

(slang, humorous, proscribed) To smoke marijuana.

A test that measures intraocular pressure (and hence glaucoma risk) by blowing a puff of air at the patient's cornea.

plural of air puff test

To act arrogantly and resolutely.