To access and make use of a resource, ability, or source of supply that was previously unused or underused.
"The programme is designed to help young people tap into their creative potential."
America, we have come so far. We have seen so much. But there is so much more to do. So tonight, let us ask ourselves — if our children should live to see the next century, what change will they see? What progress will we have made? ... We need to tap into the ingenuity of the American people.
— Barack Obama, Victory Speech, Chicago, November 4, 2008