Extending over the same area, scope, or range as something else; having equal or identical boundaries.
From co- 'together' + extensive (Latin extendere 'to stretch out'). A logical and philosophical term for entities with equivalent reach or application.
Your skin and your body are coextensive—they cover exactly the same physical extent. But in philosophy, 'the morning star' and 'the evening star' are coextensive (both Venus) yet have completely different meanings.
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