Civil Rights Issues: Goldman Sachs Black's Law Dictiary

My question involves civil rights in the State of: New York.

http://ift.tt/2anT7VB

In this Goldman Sachs case, the defendant won because of the legal definition of the word "tangible" apparently from Black's Law Dictionary (its an oversimplification of what happened). Question is how does Black's Law Dictionary gets it definitions (from statuary law) AND what happens if some term is not in it ?

Civil Rights Issues: Goldman Sachs Black's Law Dictiary