Definition of deleteriously in US English:

deleteriously

adverb

formal
  • See deleterious

    • ‘That is, as long as adventure travel doesn't deleteriously affect the sacred traditions of the region.’
    • ‘Your family, your children, your pets all might be deleteriously affected by your second-hand smoke.’
    • ‘If you inherit a disease from your grandmother and it is a disease that manifests itself in the third generation, you yourself will be deleteriously affected.’
    • ‘Other Faiths have other tenets, and should be allowed to practice their religion as they see fit, always providing that practice does not deleteriously affect others.’
    • ‘They claimed that their competitive position on the market would be deleteriously affected by the grant of such aid.’