Extensionally

Origin

extensional + -ly

Full definition of extensionally

Adverb

1. In terms or by means of extension
• 2008-01-03, Anand Vaidya, Modal Rationalism and Modal Monism, As a consequence of these two points, the burden would seem to be on the proponent of (MM) to defend the position that the two modalities are in fact extensionally equivalent, and only notionally distinct.

Antonyms

• intensionally