Definition - What does Widower mean?
A widower is a man that survived the death of his wife and who has not remarried. There are certain government benefits that widowers are entitled do and the designation is made to categorize people who have survived a spouse. If the wife had no will when she died, the widower is the beneficiary on all things. A widower is only so designated until the point where he remarries as the terminology relates to a current marriage only.
Justipedia explains Widower
A man has to be married to his partner in order to be considered a widower. If a man survives the death of his long term partner who he was not married to, he does not get to use the title of widower. Widower's benefits would be much harder to attain. In some instances where civil marriages are upheld by court, a surviving male can be considered a spouse for legal reasons.