Wiktionary
vb. To acquire a specified average value as more instances occur.
WordNet
Usage examples of "average out".
It's based on the assumption that because all the oceans are interconnected and water tends to find its own level, the ocean surface around the world forms an ellipsoid (or flattened sphere, which is what shape the earth is) of more or less uniform geometry, once you average out the tides and seasonal variations over a long period, typically 19 years.
Notwithstanding, if the process is repeated over and over again, a computer can be programed to average out the EEG pattern and compare the situation at the moment of environmental change against that average.
We might have a few more kills than they do, but things will average out over time.
Over longer periods, he tells me, such changes average out and are lost in the stream of time.
You can average out noise, you can take pictures from multiple sequential perspectives and see how things change at borderline points….
It was a tough signal to lock in on, but the errors should average out.