eclipses Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. an event where one celestial body obscures another. Example Sentence The study of solar and lunar eclipses has greatly contributed to our understanding of the universe. Synonyms obscures; overshadows; blocks Antonyms reveals; uncovers Hear It! Say It! Write It! eclipses Switch to cursive Start Share with your friends: