B1unpleasant to look at; not attractive: I find a lot of modern architecture very ugly.Yesterday in town 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).Not attractive to look atSerious and unpleasantugliness
/-nəs/noun[U]›the ugliness of the buildingsNot attractive to look atSerious and unpleasantViolent or aggressiveUnkind, cruel and unfeelingTreating people or animals badly