dark horse Meaning in the Cambridge English Dictionary
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Meaning of “dark horse” in the English Dictionary

"dark horse" in British English

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dark horsenoun [C usually singular]

uk   us  

dark horse noun [C usually singular] (SECRET)

UK a ​person who ​keepstheirinterests and ​ideassecret, ​especially someone who has a ​surprisingability or ​skill: Anna's such a ​darkhorse - I had no ​idea she'd ​published a ​novel.

dark horse noun [C usually singular] (WINNER)

US a ​horse or a ​politician who ​wins a ​race or ​competitionalthough no one ​expected them to
(Definition of dark horse from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"dark horse" in American English

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dark horsenoun [C]

 /ˈdɑrk ˌhɔrs/ infml
a ​person who is not ​expected to ​succeed in or unexpectedly ​wins an ​election, ​race, or other ​competition: a dark horse in the ​primaries
(Definition of dark horse from the Cambridge Academic Content Dictionary © Cambridge University Press)
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