Relating to or involving extension; concerning the process of stretching or enlarging something's scope or application.
From 'extension' plus the suffix '-al', which creates adjectives. 'Extension' comes from Latin extensio.
In linguistics and philosophy, 'extensional' is huge—it contrasts with 'intensional,' describing whether you care about the actual things something refers to (extension) versus how you describe them (intension), and this distinction unlocks deep questions about meaning!
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