Best definition I've found of "The American Dream" . . .
"the promise that all Americans have a reasonable chance to achieve success as they define it--material or otherwise--through their own efforts, and to attain virtue and fulfillment through success."
Jennifer Hochschild, Facing Up to the American Dream: Race, Class, and the Soul of the Nation (Princeton Univ. Press, 1995)
My addendum: the emphasis should be on "ALL" and "REASONABLE."