simple past tense and past participle of widow
"After her husband passed away, she was widowed at a young age but decided to travel the world instead of staying in their empty house."
single because of death of the spouse
"After her husband passed away last year, she remained widowed and decided to travel alone for the first time in a decade."
Whose spouse has died or is gone missing; who has become a widow or widower.
"After five years of searching, they were finally classified as widowed when her husband was declared dead due to the plane crash."