Definitions of martyr:

• noun:   one who suffers for the sake of principle
• noun:   one who voluntarily suffers death as the penalty for refusing to renounce their religion
• verb:   torture and torment like a martyr
• verb:   kill as a martyr

  Example: "Saint Sebastian was martyred"

• name:  A surname (very rare: popularity rank in the U.S.: #70318)