Definition of "Dick"

Dick

/dɪk/

proper noun
1. A diminutive of the male given name Richard, also used as a formal given name.
  Quotations
  Lascivious Edward, and thou perjur'd George,/ And thou mis-shapen Dick, I tell ye all,
  c. 1591–1592 (date written), William Shakespeare, “The Third Part of Henry the Sixt, […]”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene v]
  You may know what one man thinks of another by his manner of calling him. Thomas and James and Richard and William are stupid young gentlemen; Tom and Jem and Dick and Will are fine spirited fellows.
  1830, Mary Russell Mitford, Our Village: Fourth Series: Cottage Names:
2. A surname transferred from the given name.