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Definition of Dione
1. Proper noun. (Greek mythology) Mother of Aphrodite, and possibly the same as the goddess Rhea. ¹
2. Proper noun. (astronomy) The fourth largest moon of Saturn. ¹
3. Proper noun. (Ancient Greek female given name). ¹
4. Noun. (organic chemistry sometimes in combination) diketone ¹
¹ Source: wiktionary.com