Definition of "extensionally" [extensionally]

• In terms or by means of extension (adverb)

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• "That valuable and valued things are extensionally equivalent is a substantive (and quite controversial!) claim."
• "That valuable and valued things are extensionally equivalent is a substantive and quite controversial! claim."
• "Certainly, the structuralist faces a challenge in articulating her views to contemporary philosophers schooled in modern logic and set theory, which retains the classical framework of individual objects, and where a structure is just a particular set, namely a set of objects, and a set of relations, where the latter are thought of extensionally as just sets of ordered pairs (or more generally n-tuples in the case of n-place relations)."