natural change
nounUK /ˈnætʃrəl tʃeɪndʒ/
US /ˈnætʃərəl tʃeɪndʒ/
A natural change is something in nature that happens by itself without people doing it.
The leaves turning brown in autumn is a natural change.
RELATED WORDS
OTHER MEANINGS
2. A change in the number of people in a place caused by births and deaths, not by people moving in or out.
The town's natural change was small because births and deaths were about equal.
3. A change in the world around us that is not made by humans.
Erosion by wind and rain is a natural change to the land.
4. A slow change in living things over a very long time.
Over millions of years, natural change helped animals adapt to new places.