Air that has been heated, especially so as to function as the lifting agent of a hot-air balloon.
Empty, confused, or exaggerated talk lacking meaning or substance; bluster.
A continuous function from a topological space onto a subspace which is the identity on that subspace.
An act or instance of retracting.
A statement printed or broadcast in a public forum which effects the withdrawal of an earlier assertion, and which concedes that the earlier assertion was in error.