The Collaborative International Dictionary of English v.0.48:

Martyr \Mar"tyr\, v. t. [imp. & p. p. Martyred; p. pr. & vb.
   n. Martyring.]
   1. To put to death for adhering to some belief, esp.
      Christianity; to sacrifice on account of faith or
      profession. --Bp. Pearson.
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   2. To persecute; to torment; to torture. --Chaucer.
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            The lovely Amoret, whose gentle heart
            Thou martyrest with sorrow and with smart.
                                                  --Spenser.
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            Racked with sciatics, martyred with the stone.
                                                  --Pope.
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