Martyr

one who bears witness of the truth, and suffers death in the
cause of Christ (Acts 22:20; Rev. 2:13; 17:6). In this sense
Stephen was the first martyr. The Greek word so rendered in all
other cases is translated "witness." (1.) In a court of justice
(Matt. 18:16; 26:65; Acts 6:13; 7:58; Heb. 10:28; 1 Tim. 5:19).
(2.) As of one bearing testimony to the truth of what he has
seen or known (Luke 24:48; Acts 1:8, 22; Rom. 1:9; 1 Thess. 2:5,
10; 1 John 1:2).