The Collaborative International Dictionary of English v.0.48:

Sympathize \Sym"pa*thize\, v. i. [imp. & p. p. Sympathized; p.
   pr. & vb. n. Sympathizing.] [F. sympathiser. See
   Sympathy.]
   1. To have a common feeling, as of bodily pleasure or pain.
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            The mind will sympathize so much with the anguish
            and debility of the body, that it will be too
            distracted to fix itself in meditation.
                                                  --Buckminster.
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   2. To feel in consequence of what another feels; to be
      affected by feelings similar to those of another, in
      consequence of knowing the person to be thus affected.
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            Their countrymen . . . sympathized with their heroes
            in all their adventures.              --Addison.
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   3. To agree; to be in accord; to harmonize. --Dryden.
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