If something is considered ratified, it has been officially approved. When a constitutional amendment is voted into law, it is said to be ratified, or formally accepted.
The first known use of ratified in English occurred in the 14th Century. It comes from the Medieval Latin ratificāre, which meant "to confirm or approve." The word ratified is somewhat formal, and is officially used in government proceedings or for contracts or treaties. Still, the idea of something being confirmed or endorsed carries through in Viennese Editor Henry Anatole Grunwald's observation that "Home is one's birthplace, ratified by memory."