In English: a “Lemon” is ANY consumer product purchased at retail, that comes with a warranty (usually something in writing), costs more than $25.00, has significant problems and the folks that give the warranty are unable or unwilling to fix it within a fair number of tries.
In Legalese: a “Lemon” is any consumer product purchased at retail, that comes with an express warranty, costs more than $25.00, has one or more substantial non-conformities affecting the use, value, or safety, where the warrantor has been unable or unwilling to make it conform within a reasonable number of attempts.
Under the Federal Magnuson Moss Act: a Lemon is any product that could be used for a consumer purpose that comes with a written warranty, costs more than $25.00, has one or more substantial non-conformities affecting the use, value, or safety, and the warrantor has been unable or unwilling to make it conform within a reasonable number of attempts.