A martyr is a person who dies fighting for what they believe in. A martyr can either kill themselves or be killed.
In the 19th Century, a woman in England named Emily Davison (A member of the suffragette party) becamame a matryr after killing herself by jumping infront of horses at the "Epson Derby".
Martyrs gain a lot of sympathy by the public for preforming such an act which is one of the main contributing factors as to why they do it in the first place.
Martin Luther King is a martyr as he died defending black peoples rights