Kindly reference the following link(s):
Types of Martyrs in Islam (defend wealth, honor, Islam)
Is someone who dies defending his wealth or honor considered a Martyr?
Are Martyrs alive in their graves?
Calling someone Shaheed or Martyr & how to bury him who died in the cause of Allah
Is he a Martyr who died as a result of getting hit by a train?
Are those, who die in wars, Martyrs?
How can we be Martyrs? | Sheikh Assim Al Hakeem