Instance

Look up instantiation, instance in Wiktionary, the free dictionary.

Instantiation or instance may be

• Philosophy:

• A concept in Platonism, see idea
• Instantiation principle - the idea that if properties exist, the essence that "has" the properties must necessarily exist
• Universal instantiation and existential instantiation, two rules of logical inference
• A substitution instance is a formula of mathematical logic that can be produced by substituting certain strings of symbols for others in formulas.

• An Object (computer science) is often also referred to as an instance of a class
• Table instance (or database instance), a concept in database design; see Row (database)
• Instance dungeon, a feature of many online games such as World of Warcraft and City of Heroes
• The first moment of existence of a thing, whether living or not. The concept of the big bang theory, at the instant it happened, represents the instantiation of the universe.

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