Definition of "playpen" [playpen]

• A portable enclosure in which a baby or young child can be safely left to play. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Someone suggested that we put the tree in the playpen, but our playpen is on loan."
• "Including the playard, otherwise known as a playpen, or baby jail."
• "OF THE THREE PRESENTS WHICH PETER Holmes took back to his wife that night, the playpen was the most appreciated."