The definition you provided is mostly correct. "All the water on and above the Earth's surface, including bodies of water and water in the atmosphere" refers to the concept of the Earth's water cycle or the Earth's hydrological cycle. It encompasses the total sum of water present on Earth, including water bodies such as oceans, seas, lakes, rivers, groundwater, as well as water vapor present in the atmosphere, clouds, and even frozen water in the form of ice or snow.
