playpen

UK: /ˈpleɪpɛn/ US: /ˈpleɪˌpɛn/ ,(plā′pen′)

WordReference Random House Learner's Dictionary of American English © 2026

play•pen /ˈpleɪˌpɛn/   n. [countable]

1. a small closed-in structure in which a baby can play:
   They unfolded the playpen and put the baby in it.

WordReference Random House Unabridged Dictionary of American English © 2026

play•pen  (plā′pen′), n. 

1. a small enclosure, usually portable, in which a young child can play safely alone without constant supervision.
2. playground (defs. 2, 3).

• play + pen² 1930–35

Collins Concise English Dictionary © HarperCollins Publishers::

playpen / ˈpleɪˌpɛn/ noun

1. a small enclosure, usually portable, in which a young child can be left to play in safety