The idea of martyrdom is associated with religious faith. As such, a martyr is one who sacrifices his life for common good and becomes an exemplary character for the following generations. In Urdu poetry, a martyr is also one who suffers in love and sacrifices himself for the beloved. You may appreciate here certain interesting shades of meaning that martyr and martyrdom put forward.
ḳhuuñ shahīdān-e-vatan kā rañg lā kar hī rahā
aaj ye jannat-nishāñ hindostāñ āzād hai
KHun shahidan-e-watan ka rang la kar hi raha
aaj ye jannat-nishan hindostan aazad hai