legitimacy has definitions from the field of law
1
[ noun ] (law) lawfulness by virtue of being authorized or in accordance with law

Used in print

(Joyce O. Hertzler, American Social Institutions;...)

Finally , it gives sanctity , more than human legitimacy , and even , through super empirical reference , transcendent and supernatural importance to some values ; for_example , marriage as a sacrament , much law-breaking as sinful , occasionally the state as a divine instrument .

2
[ noun ] undisputed credibility

Related terms

credibility real_McCoy

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