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English definition of “great”

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great

adjective [-er/-est only]  /ɡreɪt/ us  

great adjective [-er/-est only] (LARGE)

large or unusually large in amount or degree: the Great Lakes He went on to great success as an actor. There was a great deal of (= a lot of) excitement in the classroom before lunch.

great adjective [-er/-est only] (IMPORTANT)

important, powerful, or famous: a great president a great athlete

great adjective [-er/-est only] (GOOD)

infml very good or very effective; excellent: We had a great time. She has a great voice. This stuff is great for cleaning windows.
greatness
noun [U]  /ˈɡreɪt·nəs/ us  
Her greatness as a writer is beyond question.

great

noun [C]  /ɡreɪt/ us  

great noun [C] (IMPORTANT PERSON)

a famous person in a particular area of activity: This sports facility is named after the tennis great Arthur Ashe.
(Definition of great adjective, noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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