A window's peak is a V-shaped hairline in the center of the forehead. The origins of the name are unknown, but the lore suggests the name stems from the hats women used to wear while mourning the loss of their husbands in the 18th century. Regardless of the origin of the name, a window's peak hairline is likely a genetic trait, and nothing to be ashamed of.
While most widow's peak hairlines are likely genetic or a natural result of aging, some progression may stem from other conditions, meaning the height of the peak might be reversed or the rate of hair loss slowed. The primary concern for those wishing to alter their appearance is finding the root cause of hair loss and the most appropriate method to fix or reverse the damage.