a long-term monogamous relationship between husband and wife, in which one man and one woman, never previously married, wed and stay wedded until the day they die, come hell, high water, or anything in between. Also, an extreme commitment between husband and wife. See LDS Temple Marriage for more information.
Tim: "Dani, I'm so glad we've decided to be "one and done," so that we can stay committed to each other for the rest of our lives.
Dani: "That's right, Tim. We will never get a divorce, so long as we both shall live. In fact, according to LDS doctrine, we will stay married even after we die, and become gods and goddesses!"
Tim: "One and done, you've saved our marriage!"
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