a. An outdoor area featuring equipment designed for recreation and play, such as seesaws and swings.
b. An indoor area, such as a room at a community center, that is set up with similar equipment.
2. A field or sphere of unrestricted pleasurable activity: "Foreign affairs had been T.R.'s personal playground during his Presidency" (John Dos Passos).
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.