Definition of unreliability in US English:

unreliability

noun

  • Inability to be relied upon or trusted.

    ‘she causes havoc in the office because of her unreliability’
    ‘the unreliability of memory’
    • ‘The bikes quickly developed a reputation for unreliability—they couldn't handle the hard paces through which Americans put them.’
    • ‘All he had to show for his service was a record of unreliability.’
    • ‘In discussing these events, Kelsey does an excellent job of highlighting the unreliability of contemporary written sources.’
    • ‘The memory researcher appeared on a television show about the unreliability of eyewitness testimony.’
    • ‘Accounts of population movements in the past usually begin with a reference to the unreliability of the data.’

Pronunciation

unreliability

/ˌənrəˌlaɪəˈbɪlədi//ˌənrəˌlīəˈbilədē/