English Reference

Word

legitimacy

Phoneticsle·git·i·ma·cy

US/ɫəˈdʒɪtəməsi/

UK/lədʒˈɪtɪməsi/

Definitions

01validity or fairness

C1

n. the quality of being reasonable, fair, or acceptable to people.

n. the quality of being justifiable or acceptable according to social standards or logic.

“The public questioned the legitimacy of the new law because it seemed unfair.”

“The administration struggled to maintain its legitimacy after several high-profile scandals eroded the public's trust in the democratic process.”

Academic

Usage

Often used with the preposition 'of'.

Antonyms

invalidity

02legal status

C1 · Law

n. the state of being legal or following the law.

n. the state of being lawful or conforming to established legal rules.

“The court had to decide on the legitimacy of the contract signed last year.”

“Legal scholars debated the legitimacy of the tribunal, arguing that it lacked the necessary international mandate to prosecute the defendants.”

Formal · Technical

Synonyms

lawfulnesslegality

Antonyms

illegality

03birth or succession

C2 · History

n. the legal status of being born to parents who are married, especially regarding royal titles.

n. the status of being born in wedlock or having a valid claim to a title through direct descent.

“The prince had to prove his legitimacy to claim the throne after the king died.”

“The succession crisis was fueled by rumors regarding the legitimacy of the heir, leading to a prolonged civil war between rival factions.”

Formal · Literary

Synonyms

Antonyms

illegitimacy

Real-World Examples

“If Syrian forces appear to be fighting on behalf of foreign powers, the leadership could lose domestic and regional legitimacy that would be difficult to restore.”
Al Jazeera · 15 Aug 2026
“He denied he was attempting to provide “a veneer of legitimacy” to the contract.”
The Guardian · 14 Aug 2026

Etymology

From legitimate + -cy.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

This entry

Level
C1 · Advanced
Frequency
Frequent
Updated

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English Reference