Be significant, indicate a great deal, as in That house of theirs speaks volumes about their income. This idiom uses volumes in the sense of “the information contained in volumes of books.” [c. 1800]
Words nearby speak volumes
How to use speak volumes in a sentence
So we do demand justice and we do speak up and make demands.
Or has the see and hear and speak-no-evil stance of the Republican House persuaded him that he is in the clear?
“We met the smuggler in the train station; he came to speak with us about the services he provided,” Yazbek says.
He disagrees, though, and says it is the duty of every person—men, especially—to speak up on this issue.
They were born in 51 countries and speak 59 foreign languages, but they seemed bound by a single purpose and resolve.
“Perhaps you do not speak my language,” she said in Urdu, the tongue most frequently heard in Upper India.The Red Year|Louis Tracy
Now first we shall want our pupil to understand, speak, read and write the mother tongue well.The Salvaging Of Civilisation|H. G. (Herbert George) Wells
To be wiser than other men is to be honester than they; and strength of mind is only courage to see and speak the truth.
Since this is a law of vibration, it is unscientific to speak of giving an overtone, for all tones contain overtones.Expressive Voice Culture|Jessie Eldridge Southwick
When we speak against one capital vice, we ought to speak against its opposite; the middle betwixt both is the point for virtue.