This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The quality or fact of being legitimate.

n. the quality of being legitimate or valid; validity

n. The state, or quality, of being legitimate, or in conformity with law; hence, the condition of having been lawfully begotten, or born in wedlock.

n. The state of being legitimate; conformity to law, rule, or principle; natural or logical result; regularity; propriety; correctness: as, the legitimacy of a government, of an argument, or of a conclusion.

n. Specifically Lawfulness of birth: opposed to bastardy.

n. Directness or regularity of descent, as affecting the right of succession. See legitimist, 2.

n. undisputed credibility

n. lawfulness by virtue of being authorized or in accordance with law

"Whereas authority refers to a specific position in an established government, the term legitimacy is used when describing a system of government itself - where government may be generalized to mean the wider 'sphere of influence.'"

lawfulness   

illegitimacy   

credibility    validity    prestige    expediency    equality    authenticity    accountability    competence    sovereignty    autonomy