National Park Service: Meaning and Definition of

Na'tional Park' Serv"ice

Pronunciation: [key]
— U.S. Govt. U.S. Govt.
  1. a division of the Department of the Interior, created in 1916, that administers national parks, monuments, historic sites, and recreational areas.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.