The meaning of UNRELIABLE is not reliable : undependable, untrustworthy. How to use unreliable in a sentence.

(Definition of unreliable from the Cambridge Academic Content Dictionary © Cambridge University Press)

UNRELIABLE definition: not reliable; not to be relied or depended on. See examples of unreliable used in a sentence.

If you describe a person, machine, or method as unreliable, you mean that you cannot trust them. Diplomats can be a notoriously unreliable and misleading source of information. His judgement …

1. inaccurate, unconvincing, implausible, mistaken, false, uncertain, fake, deceptive, erroneous, unsound, fallible, specious, delusive The figures were unreliable because the sample sizes …

Definition of unreliable adjective from the Oxford Advanced Learner's Dictionary. that cannot be trusted or depended on. The trains are notoriously unreliable. He's totally unreliable as a …

unreliable, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Nov 24, 2025 · Noun [edit] unreliable (plural unreliables) One who or that which cannot be relied upon. quotations

Someone unreliable can't be trusted to do something. Things can be unreliable too, like a bike with a wobbly wheel.

Synonyms for UNRELIABLE: erratic, shaky, inconsistent, undependable, untrustworthy, unpredictable, volatile, unstable; Antonyms of UNRELIABLE: reliable, dependable, …