«قُلْ هُوَ نَبَأٌ عَظِيمٌ»
“Say: It is a tremendous report.” (Ṣād 38:67)
“Nabaʾ” is a noun for important news, but identifying the news referred to here requires attention to the surrounding discourse. “ʿAẓīm” intensifies its significance, and the pronoun “huwa” likewise depends on context for its referent.
A dictionary definition alone does not supply the whole interpretation. The passage’s subject and its rhetorical aim make the general word point to a particular great announcement.