Main Entry: un·be·liev·able

Pronunciation: \-ˈlē-və-bəl\

Function: adjective

Date: 1548

: too improbable for belief <the plot is unreal and unbelievable>; also : of such a superlative degree as to be hard to believe <the destruction was unbelievable> <made an unbelievable catch in center field>

— un·be·liev·ably \-blē\ adverb