Shorter ways to say it

• Simple definition: imposing upon someone’s body, autonomy or property without consent. It’s doing something that creates legal victim.
• A concise yet comprehensive definition: initiating, threatening or creating a substantial risk of non-consensual physical force against another person or their property, as well as fraud, coercion, obstructing justice and breaching a contract or fiduciary duty.

Legal context

In the context of the Live and Let Live Global Peace Movement, ‘aggressing’ is a ‘Term of Art’, meaning that it has a distinct legal meaning - in this case, ‘aggressing’ is a category of activity.