American Dictionary

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Definition knoll in American English

knoll noun

[countable] noun
/noʊl/

This word is perhaps best known because of the “grassy knoll” near the place where U.S. President Kennedy was shot and killed in 1963. Although Lee Harvey Oswald was arrested and charged with the murder, some people believe there was a mysterious second murderer, who has never been caught, hiding behind the grassy knoll.

1

a low round hill

Synonyms and related words
Definition knoll in American English