1. A body of water that formed naturally through geological processes, such as glaciation, tectonic activity, or erosion, rather than being artificially created by humans
The natural lake was formed thousands of years ago by a glacier.
O lago natural foi formado há milhares de anos por uma geleira.
2. A freshwater or saltwater lake that exists in its original state without significant human modification
The region is home to several pristine natural lakes.
A região abriga vários lagos naturais pristinos.