Meaning:You use this proverb to say that a picture can give you as much information as a written or spoken text with a lot of words can.
If someone says, "A picture is worth a thousand words," he/she means that you can describe something by drawing just one picture as well as you can by writing or saying a lot of words.
People also say "A picture paints a thousand words."
Example:
Thank you for trying to give me directions, but it's too confusing to me. Would you mind drawing a map for me? A picture is worth a thousand words.
