noun · 1 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Received-Pronunciation:kŭsʹtŏs rĕgʹnī
Received-Pronunciation:kŭsʹtōs rĕgʹnī
Received-Pronunciation:/ˈkʌstɒs ˈɹɜɡnaɪ/
Received-Pronunciation:/ˈkʌstəʊs ˈɹɜɡnaɪ/
1
noun
Meaning 1
A kind of viceregal locum tenens appointed, either alone or jointly, to execute the political duties of a monarch during his or her absence from the seat of government.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
History
Etymology
First attested in the plural in October 1644 and in the singular in 1683; Latin: custōs (“guard”, “protector”; “guardian”; “keeper”, “custodian”) + rēgnī (“of royal power”; genitive singular of rēgnum, “royal power”, “kingdom”) = “custodian of royal power” ≈ “guardian of the realm”.