What is defined as any collection of fresh water surrounded by land?

A collection of fresh water surrounded by land is defined as a lake. Lakes are larger than ponds and are typically deeper, with a certain volume of water that provides distinct ecological habits. They can support various forms of wildlife and are important for ecosystems and human activities, such as recreation and drinking water supply.

In contrast, oceans refer to vast bodies of saltwater, which do not fit the definition of being surrounded by land. Ponds are smaller and shallower than lakes, usually supporting a different set of ecological conditions, and streams are moving bodies of water, which are not surrounded by land in the way that lakes are. This makes the definition of a lake particularly relevant to the term in question.