Electrical phenomena are a somewhat arbitrary division of electromagnetic phenomena.
Retrieved from Wikipedia CC BY-SA 3.0
With this arbitrary division, the presbytery was improperly narrow for such a grand cathedral.
Retrieved from Wikipedia CC BY-SA 3.0
As a geographical concept, an imaginary line may serve as an arbitrary division (such as a border).
Retrieved from Wikipedia CC BY-SA 3.0
Other arbitrary divisions may be in use.
Retrieved from Wikipedia CC BY-SA 3.0