The Collaborative International Dictionary of English v.0.48:

Parker \Park"er\, n.
   The keeper of a park. --Sir M. Hale.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Parker
    n 1: United States saxophonist and leader of the bop style of
         jazz (1920-1955) [syn: Parker, Charlie Parker,
         Yardbird Parker, Bird Parker, Charles Christopher
         Parker]
    2: United States writer noted for her sharp wit (1893-1967)
       [syn: Parker, Dorothy Parker, Dorothy Rothschild
       Parker]