The Collaborative International Dictionary of English v.0.48:

Breathe \Breathe\, v. t.
   1. To inhale and exhale in the process of respiration; to
      respire.
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            To view the light of heaven, and breathe the vital
            air.                                  --Dryden.
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   2. To inject by breathing; to infuse; -- with into.
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            Able to breathe life into a stone.    --Shak.
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            And the Lord God formed man of the dust of the
            ground, and breathed into his nostrils the breath of
            life.                                 --Gen. ii. 7.
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   3. To emit or utter by the breath; to utter softly; to
      whisper; as, to breathe a vow.
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            He softly breathed thy name.          --Dryden.
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            Or let the church, our mother, breathe her curse,
            A mother's curse, on her revolting son. --Shak.
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   4. To exhale; to emit, as breath; as, the flowers breathe
      odors or perfumes.
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   5. To express; to manifest; to give forth.
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            Others articles breathe the same severe spirit.
                                                  --Milner.
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   6. To act upon by the breath; to cause to sound by breathing.
      "They breathe the flute." --Prior.
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   7. To promote free respiration in; to exercise.
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            And every man should beat thee. I think thou wast
            created for men to breathe themselves upon thee.
                                                  --Shak.
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   8. To suffer to take breath, or recover the natural
      breathing; to rest; as, to breathe a horse.
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            A moment breathed his panting steed.  --Sir W.
                                                  Scott.
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   9. To put out of breath; to exhaust.
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            Mr. Tulkinghorn arrives in his turret room, a little
            breathed by the journey up.           --Dickens.
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   10. (Phonetics) To utter without vocality, as the nonvocal
       consonants.
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             The same sound may be pronounces either breathed,
             voiced, or whispered.                --H. Sweet.
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             Breathed elements, being already voiceless, remain
             unchanged

   Note: [in whispering].                         --H. Sweet.
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   To breathe again, to take breath; to feel a sense of
      relief, as from danger, responsibility, or press of
      business.

   To breathe one's last, to die; to expire.

   To breathe a vein, to open a vein; to let blood. --Dryden.
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The Collaborative International Dictionary of English v.0.48:

Breathe \Breathe\ (br[=e][th]), v. i. [imp. & p. p. Breathed
   (br[=e][th]d); p. pr. & vb. n. Breathing.] [From Breath.]
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   1. To respire; to inhale and exhale air; hence;, to live. "I
      am in health, I breathe." --Shak.
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            Breathes there a man with soul so dead
            Who never to himself hath said,
            This is my own, my native land!       --Sir W. Scott
                                                  [The Lay of
                                                  the Last
                                                  Minstrel].
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   2. To take breath; to rest from action.
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            Well! breathe awhile, and then to it again! --Shak.
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   3. To pass like breath; noiselessly or gently; to exhale; to
      emanate; to blow gently.
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            The air breathes upon us here most sweetly. --Shak.
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            There breathes a living fragrance from the shore.
                                                  --Byron.
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WordNet (r) 3.0 (2006):

breathe
    v 1: draw air into, and expel out of, the lungs; "I can breathe
         better when the air is clean"; "The patient is respiring"
         [syn: breathe, take a breath, respire, suspire]
    2: be alive; "Every creature that breathes"
    3: impart as if by breathing; "He breathed new life into the old
       house"
    4: allow the passage of air through; "Our new synthetic fabric
       breathes and is perfect for summer wear"
    5: utter or tell; "not breathe a word"
    6: manifest or evince; "She breathes the Christian spirit"
    7: take a short break from one's activities in order to relax
       [syn: rest, breathe, catch one's breath, take a
       breather]
    8: reach full flavor by absorbing air and being let to stand
       after having been uncorked; "This rare Bordeaux must be
       allowed to breathe for at least 2 hours"
    9: expel (gases or odors) [syn: emit, breathe, pass off]