Meaning of “ugly” in the English Dictionary

"ugly" in British English

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uglyadjective

uk /ˈʌɡ.li/ us /ˈʌɡ.li/

ugly adjective (NOT ATTRACTIVE)

B1 unpleasant to look at; not attractive:

I think a lot of modern architecture is very ugly.
Yesterday I saw the ugliest baby I've ever seen in my life.
I feel really fat and ugly today.
He was a really unpleasant man and as ugly as sin (= very ugly).

More examples

ugliness
noun [ U ] uk /ˈʌɡ.li.nəs/ us /ˈʌɡ.li.nəs/

the ugliness of the buildings

(Definition of “ugly” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"ugly" in American English

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uglyadjective [ -er/-est only ]

us /ˈʌɡ·li/

ugly adjective [ -er/-est only ] (VERY UNATTRACTIVE)

extremely unattractive in appearance:

He’s a really ugly dog.

ugly adjective [ -er/-est only ] (UNPLEASANT)

unpleasant and threatening or violent:

This policy could have some ugly consequences.

(Definition of “ugly” from the Cambridge Academic Content Dictionary © Cambridge University Press)