1. a portable enclosure with low sides in which a baby or small child can play safely

Examples

• The baby played with toys in her playpen while her mother cooked dinner.
• We set up the playpen in the living room so we could watch the toddler.
• The portable playpen folds up easily for travel.
• He crawled around the playpen, exploring his colorful blocks.
• The playpen kept the child safe while the parents were busy nearby.
• She outgrew her playpen by the time she turned two years old.