Webster's Revised Unabridged Dictionary · 1913

Martyr

Martyr , noun

[Anglo-Saxon, from Latin martyr, Greek ma`rtyr, ma`rtys, prop., a witness; compare Sanskrit smr to remember, English memory.]

1.
One who, by his death, bears witness to the truth of the gospel; one who is put to death for his religion; as, Stephen was the first Christian martyr. — Chaucer
To be a martyr, signifies only to witness the truth of Christ; but the witnessing of the truth was then so generally attended with persecution, that martyrdom now signifies not only to witness, but to witness by death. — South
2.
Hence, one who sacrifices his life, his station, or what is of great value to him, for the sake of principle, or to sustain a cause.
Then if thou fall'st, O Cromwell, Thou fall'st a blessed martyr! — Shakespeare

Martyr , transitive verb

1.
To put to death for adhering to some belief, esp. Christianity; to sacrifice on account of faith or profession. — Bp. Pearson
2.
To persecute; to torment; to torture. — Chaucer
The lovely Amoret, whose gentle heart Thou martyrest with sorrow and with smart. — Spenser
Racked with sciatics, martyred with the stone. — Pope