The phrase "Deep ravine" commonly refers to a geographical feature such as a gorge, chasm, canyon, abyss, ghyll, gulch, or barranca. These are all types of narrow, steep-sided valleys or openings in the earth's surface that can be quite deep. The term "deep ravine" itself can be synonymous with these words in various contexts, especially in crossword puzzles or geographic descriptions. Regarding "Deep Ravine CO," there is no specific place named exactly "Deep Ravine" in Colorado widely recognized in the search results. However, the term "deep ravine" in Colorado could describe natural landforms or ravines typical in the state's mountainous and rugged terrain. For example, Colorado is known for having many canyons and ravines such as those found in the Rocky Mountains. A notable related result found was "Deep Ravine Cove" in El Dorado County, California, not Colorado. If the inquiry is about identifying the meaning or synonyms for "deep ravine," the following words are key: gorge, canyon, chasm, abyss, gulch, and barranca. If the focus is on a specific location named "Deep Ravine" in Colorado, no direct match was found, suggesting it might be a less common or unofficial place name or requires more specific context for accurate identification.