noun
: a relation that is involved in or essential to the nature of the thing related
logical equivalence of propositions is an internal relation — Arthur Pap
— contrasted with external relation
noun
: a relation that is involved in or essential to the nature of the thing related
logical equivalence of propositions is an internal relation — Arthur Pap
— contrasted with external relation
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012