(programming, object-oriented programming) A principle that states that software entities (such as classes, modules, and functions) should be open for extension, but closed for modification.

(programming, object-oriented programming) The principle that every class should have a single responsibility entirely encapsulated by that class.

(programming, object-oriented programming) principle that states that once an interface has become too large, it needs to be split into smaller and more specific interfaces so that any client of the interface will only know about the methods that pertain to itself. (In other words: no client should be forced to depend on methods it does not use.)

(software, design) a technique by which classes may achieve polymorphic behavior and code reuse by containing other classes that implement the desired functionality instead using inheritance.

(evolutionary biology) A principle of asymmetry in selective pressure between predators and prey.

(software, user interface, design) A principle that the design should match the user's experience, expectations, and mental models.

(software, object-oriented programming) Synonym of Law of Demeter

(philosophy) The proposition that nothing happens without a sufficient reason why it should be as it is and not otherwise.

(historical) The political philosophy espoused by Sun Yat-sen and the Chinese Nationalist Party.

plural of dictionary on historical principles