Their eyes spoke volumes.
Meaning: This sentence means that their eyes showed what they were feeling, even though they didn't say anything.
Choice of Words: Eyes are the organs of sight. Spoke is the past tense of speak, which means to communicate using words. Volumes means a large amount or quantity. When you put them together, "Their eyes spoke volumes" means that their eyes communicated a lot of information and emotion, even though they didn't say anything.
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Related Expressions