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From Scottish raliabill, itself from to rely + -able


  • enPR: rĭ-līʹə-bəl, IPA(key): /ɹɪˈlaɪəbəl/
  • (file)
  • Rhymes: -aɪəbəl


reliable (comparative more reliable, superlative most reliable)

  1. Suitable or fit to be relied on; worthy of dependence, reliance or trust; dependable, trustworthy
    • (Can we date this quote by Andrews Norton and provide title, author’s full name, and other details?)
      a reliable witness to the truth of the miracles
    • (Can we date this quote by Samuel Taylor Coleridge and provide title, author’s full name, and other details?)
      the best means, and most reliable pledge, of a higher object
    • (Can we date this quote by Washington Irving and provide title, author’s full name, and other details?)
      According to General Livingston's humorous account, his own village of Elizabethtown was not much more reliable, being peopled in those agitated times by unknown, unrecommended strangers, guilty-looking Tories, and very knavish Whigs.
  2. (signal processing, of a communication protocol) Such that either a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didn't



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reliable (plural reliables)

  1. Something or someone reliable or dependable
    the old reliables