°(usually of a decision) Based on individual discretion or judgment; not based on any
objective distinction, perhaps even made at
random.
"Benjamin Franklin's designation of "positive" and "negative" to different charges was arbitrary. In fact, electrons flow in the opposite direction to conventional current."
""The Russian trials were Stalin's purges, with which he attempted to consolidate his power. Like most people in the West, I believed these show trials to be the arbitrary acts of a cruel dictator." ()"