Meaning of ARBITRARY in English
If you describe an action, rule, or decision as ~, you think that it is not based on any principle, plan, or system. It often seems unfair because of this.
Arbitrary arrests and detention without trial were common.
The victims were not chosen arbitrarily.
ADV: ADV with v
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012