Dictionary and Thesaurus

Definition of Unbelievable

• (adjective) beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible"
• (adjective satellite) having a probability too low to inspire belief

Synonyms of Unbelievable

• Incredible
• Improbable
• Unconvincing
• Unlikely

Antonyms of Unbelievable

• Credible

Homophones of Unbelievable