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English definition of “lonely”

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lonely

adjective  /ˈloʊn·li/ us  
(of someone) feeling sad because you are alone, or (of something) causing this feeling: a lonely child my lonely room A lonely place has no people, buildings, etc.: a lonely and deserted road
loneliness
noun [U]  /ˈloʊn·li·nəs/ us  
Some elderly people live in isolation and loneliness.
(Definition of lonely from the Cambridge Academic Content Dictionary © Cambridge University Press)
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