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Phrase(s): A picture is worth a thousand words.
Prov. Pictures convey information more efficiently and effectively than words do. • It’s much easier to learn how machines work by looking at pictures, rather than by hearing someone describe them. A picture is worth a thousand words. • The newspaper editor decided to devote more space to photographs of the disaster than to text, since a picture is worth a thousand words.
McGrawhill's American Idioms And Phrasal Verbs