Bona Fide Sale

What does Bona Fide Sale mean in American Law?

The definition of Bona Fide Sale in the law of the United States, as defined by the lexicographer Arthur Leff in his legal dictionary is:

A genuine (i.e., not sham) sale. But also a sale made to a bona fide purchaser, and also one made by a seller who has no notice of defect in his title or restrictions upon his right to sell.