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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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Several hundred people were affected by the previously unknown virus.
Most of her friends are unknown to me.
For some unknown reason, the plane landed at the wrong airport.
an unknown poet
Unknown to the MP, his secretary had already spoken to reporters.
This is the British English definition of unknown. View American English definition of unknown.
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View the pronunciation for unknown.
a new word or phrase invented in the hope that it will become generally used
the distance from the centre of a circle to its edge, or a straight line from the centre to the edge
a collection of debris, mostly consisting of plastic, which moves around in the sea …
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Definition of unknown from the online English dictionary from Macmillan Publishers Limited.