unreliable

adjective un·re·li·able \ ˌən-ri-ˈlī-ə-bəl \
|Updated on: 4 Aug 2018

Definition of unreliable

: not reliable : undependable, untrustworthy
  • an unreliable friend
  • an unreliable source of funding
  • an unreliable car

unreliability

play \ˌən-ri-ˌlī-ə-ˈbi-lə-tē\ noun
    • the unreliability of the data
    • a person with a reputation for unreliability

unreliably

play \ˌən-ri-ˈlī-ə-blē\ adverb
    • a method that works unreliably

Recent Examples of unreliable from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unreliable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of unreliable

1810

in the meaning defined above

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UNRELIABLE Defined for Kids

unreliable

adjective un·re·li·able \ ˌən-ri-ˈlī-ə-bəl \

Definition of unreliable for Students

: not worthy of trust He got rid of his unreliable car.


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