The Global Terrorism Database has one (and scroll to Data Collection and the Definition of Terrorism):

the threatened or actual use of illegal force and violence by a non-state actor to attain a political, economic, religious, or social goal through fear, coercion, or intimidation.

Notice that: no killings necessary to be an act of terrorism. No destruction necessary to be an act of terrorism. No definition of what constitutes violence. In the end, only the threat of…something…is necessary to be an act of terror.

Leave it to the Left (the GTD is an arm of the University of Maryland) to invent a version of terrorism that could include microaggressions, triggers, and on and on—all acts of “fear,” “coercion,” “intimidation” in the hearts of precious snowflakes and others terrified of disagreement or uncomfortable truths.

It’s true that the GTD picked up this definition from a predecessor; however, GTD has made no effort to tighten the definition at all. It’s only made its database searchable with criteria that let the searcher make up whatever definition of terrorism suits his narrative.

Microaggressions as terrorism. Triggers as terrorism. Hurt feelings as terrorism.

Hmm….