I see, so that measures the speed of them across the screen this way you can time it.

It measures food security across most of the countries of the world.

Often (but not always) this is measured across multiple contexts.

The values range from 0 to 100 and measures the relative separation or integration of groups across an area.

It can also be used for measuring the voltage across two points in a circuit.

Our population density is very low when you measure population across the entire country.

The Sun is about a hundred times bigger than the Earth as you measure across it.

Measured across the long sweep of history, it wasn't that long ago.

In the field of medicine, it is defined as "occurring or being measured across the tongue".

Ralph was measuring the rope across the reach of his outstretched arms.