(ethics, philosophy) The ethical principle asserting that initiating physical force against persons or their justly acquired property, or threatening to do so, is illegitimate.

(physics) A conjecture asserting that it is impossible to create paradoxes by time travel because the past cannot be changed.

(physics) Synonym of Ritz's combination principle

(software, object-oriented design) Synonym of General Responsibility Assignment Software Patterns

In a principled manner.

The state or condition of being principled.