What does "across the board" mean in the following sentence?

See also http://www.phrases.org.uk/meanings/across-the-board.html

First of all, it's "Prices have been reduceD across the board". Second, "across the board" is an idiom, and must be learned as a complete phrase. If you want a "picture" of what it means, you can think of a "board", like a chalkboard at school, which is usually pretty wide. Then draw a chalk line from one side and don't stop until you get the the other side. You have now covered the entire distance "across the board", so that should give you the picture of "for everything", "equally for everyone", and "in all cases".

Across the board....Means all around. The lights were green across the board. Things have to change across the board means for all here. English colloquialisms are confusing. You are correct about the other use of board!! What is your first language?

Across the board means in every aspect or across all items or all categories. It is not selective, but rather all inclusive.