(physics) The principle that a volume is a boundary of a higher-dimension region

In the neo-Gricean semantics and pragmatics of Laurence R. Horn: a reformulation of Paul Grice's maxim of relation combined with the second submaxim of quantity and the third and fourth submaxims of manner, stating: "Say no more than you must (given Q)", and implying that there is no reason to make a stronger statement if the extra information can be contributed by implicature.

In the neo-Gricean semantics and pragmatics of Laurence R. Horn: a reformulation of Paul Grice's maxim of quantity combined with the first two submaxims of manner, stating: "Say as much as you can (given R)", and leading to the implicature that if the speaker did not make a stronger statement (or say more), then its denial is (implied to be) true.

The link between ray optics and wave optics, stating (in its original strong form) that the path taken by a ray between two given points is the path that can be travelled in the least time, or (in a weaker form that is true for all cases) in a time that is "stationary" with respect to variations of the path — so that a deviation in the path causes, at most, a second-order change in the traversal time.

(law) legal principle under which the state should only limit an individual's actions to the extent that they would cause harm to another

The idea that decisions about how to spend research funds should be made by researchers rather than politicians.

(industrial relations) Any of a set of rules aimed at resolving conflicts among trade unions.

The concept that offenders should be punished according to how blameworthy they are.

plural of agreement in principle

A principle stating that the most effective design for a product is one that is "Most Advanced, Yet Acceptable", or one that combines familiarity and novelty.