exhale

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To breathe out.
• intransitive verb To emit air or vapor.
• intransitive verb To be given off or emitted.
• intransitive verb To blow (something) forth or breathe (something) out.
• intransitive verb To give off; emit.

from The Century Dictionary.

• To send out as breath or as if by breathing; emit an effluence of; give out as vapor, either perceptible or imperceptible: as, marshes exhale noxious effluvia.
• To draw out as an effluence; cause to be sent out or emitted in vapor; evaporate: as, the sun exhales the moisture of the earth.
• To draw forth; cause to flow, as blood.
• To rise or pass off as an effluence; go off in vapor.
• To pass through in the form of drops; ooze: noting especially bleeding from a surface in the absence of any wound.
• To hale or drag out.
• To draw, as a sword.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To rise or be given off, as vapor; to pass off, or vanish.
• transitive verb To breathe out. Hence: To emit, as vapor; to send out, as an odor; to evaporate
• transitive verb To draw out; to cause to be emitted in vapor.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb intransitive To expel air from the lungs through the nose or mouth by action of the diaphragm.
• verb intransitive To pass off in the form of vapour; to emerge.
• verb transitive To expel (something) from the lungs by action of the diaphragm.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb give out (breath or an odor)
• verb expel air