'Unique' in the Bible

My dove, my perfect one, is unique. She is her mother's only daughter. She is the favorite one of her who bore her. The daughters saw her, and called her blessed; the queens and the concubines, and they praised her.

It will be a unique day which is known to Yahweh; not day, and not night; but it will come to pass, that at evening time there will be light.