The term ONE GRAND can be broken down into three separate words: THOU (4 letters), PIANO (5 letters), and CENTRALSTATION (14 letters). THOU is an archaic term for the number one thousand. A PIANO is a musical instrument with keys that are used to produce sound. Centralstation is a term used to describe a large train station or hub. Together, these three words form the phrase 'one grand, ' which is a slang term for one thousand dollars.