1(An instance of) unregulated or unrestricted playtime for children.
2Mechanics disengaged motion in a mechanism on a motor vehicle; the distance a mechanism can be moved before it engages.
Late 19th century.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。