Definition of exhales:
(v) :
(intransitive) To expel air from the lungs through the nose or mouth by action of the diaphragm, to breathe out.
(v) :
(transitive) To expel (something, such as tobacco smoke) from the lungs by action of the diaphragm.
(v) :
(transitive) To emit (a vapour, an odour, etc.).
(v) :
(intransitive) To pass off in the form of vapour; to emerge.
(v) :
(transitive) To draw out; to cause to be emitted in vapour.
(n) :
An exhalation.