Definition of harmfulness in US English:

harmfulness

noun

  • See harmful

    • ‘The fact is that cults can only be consistently defined and opposed on grounds of their harmfulness.’
    • ‘A form that has a soothing, healing effect is the result of a mind that is free from harmfulness and defects.’
    • ‘In the early 20th century the practice of spirit worship, along with a host of other religious practices, was assailed by urban intellectuals for its purported backwardness, ignorance and harmfulness.’
    • ‘The present study confirmed the harmfulness of bidis in the causation of lung cancer.’
    • ‘If some members of a set differ in some important way from the others, usually in terms of their danger or harmfulness, they are put into another group.’

Pronunciation

harmfulness

/ˈhärmfəlnəs//ˈhɑrmfəlnəs/