'Widow' in the Bible

So David went up there, and his two wives also, Ahinoam the Jezreelitess and Abigail the widow of Nabal the Carmelite.

and his second, Chileab, by Abigail the widow of Nabal the Carmelite; and the third, Absalom the son of Maacah, the daughter of Talmai, king of Geshur;

So Nathan went to his house.Then the Lord struck the child that Uriah’s widow bore to David, so that he was very sick.

The king said to her, “What is your trouble?” And she answered, “Truly I am a widow, for my husband is dead.