unreliable

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

Definition of unreliable

  1. :  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

1810

First Known Use of unreliable

1810


UNRELIABLE Defined for Kids

unreliable

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

Definition of unreliable for Students

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



Seen and Heard

What made you want to look up unreliable? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a lively discussion

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!