AskDefine | Define unbelievable

Dictionary Definition

unbelievable adj
1 beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible" [syn: incredible] [ant: credible]
2 having a probability to low to inspire belief [syn: improbable, unconvincing, unlikely]

User Contributed Dictionary



From un- + believe + -able.



  1. Incredible; not to be believed.
    The most unbelievable thing happened to me today!
    This restaurant makes unbelievable pizza!
  2. Implausible or improbable.
    His excuse seems rather unbelievable.




  • Dutch: ongelofelijk
  • French: incroyable
  • German: unglaublich
  • Hungarian: hihetetlen
  • Italian: incredibile
  • Portuguese: inacreditável
  • Spanish: increíble

Extensive Definition

Unbelievable may refer to:

Synonyms, Antonyms and Related Words

a bit thick, a bit thin, absurd, antic, beyond belief, doubtable, doubtful, dubious, dubitable, fanciful, fantastic, flimsy, hard of belief, hard to believe, implausible, impossible, improbable, incomprehensible, inconceivable, incredible, mind-boggling, not deserving belief, open to doubt, open to suspicion, passing belief, preposterous, problematic, questionable, ridiculous, staggering belief, suspect, suspicious, tall, thick, thin, unaccountable, unconvincing, unearthly, unexpected, ungodly, unimaginable, unsubstantial, unthinkable, unworthy of belief, weak
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