Is a woman considered to be under an irrevocable major divorce (bainunah kubra) simply upon the completion of her iddah after the first divorce?

If the waiting period (iddah (definition)) ends after the first or second divorce, the woman becomes revocably divorced (bainunah sughra). The husband may take her back with a new contract and a new dower (mahr), and she does not need to marry anyone else. As for the irrevocable divorce (bainunah kubra), which is the third divorce, the woman does not become lawful for her first husband unless she marries another man and consummates the marriage with him, and then he divorces her, and her waiting period (iddah) from him ends.