defensionis

Defensionis is a term primarily associated with historical legal and military contexts, referring to the act or right of self-defense. In Roman law, for instance, the concept of *ius defensionis* acknowledged an individual's right to protect themselves, their property, or their family from unjust attack. This was not an unfettered right but was generally understood within the framework of proportionality and necessity.

The term also appears in discussions of medieval and early modern warfare. In a military sense, "defensionis" could relate to the measures taken to defend a fortified position or a territory. This might include the construction of defenses, the deployment of troops, or strategies aimed at repelling an invading force. The emphasis was on the active process of warding off aggression.

More broadly, "defensionis" can be understood as a principle that underpins various forms of protection. While its direct usage is less common in modern vernacular, the underlying concept of legitimate defense remains a fundamental aspect of international law, criminal law, and personal security. The conditions under which defense is permissible and the scope of such defense are subjects that continue to be debated and refined in contemporary legal and ethical discourse. The core idea, however, remains consistent: the right to resist illegitimate harm.