Meaning of the word "dark horse" in English

What does "dark horse" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

dark horse

US /dɑrk hɔrs/
UK /dɑrk hɔrs/
"dark horse" picture

Idiom

1.

a person who keeps their abilities and intentions secret and who surprises people by doing something unexpected, especially by winning a competition or election

Example:
No one expected him to win; he was a real dark horse in the race.
She's a bit of a dark horse; you never know what she's going to do next.
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