latchkey

n.

闩锁钥匙，弹簧锁钥匙；

复数：latchkeys

1. She won't interfere with you any more; your independence is achieved and you have won your latchkey.
   她再与也不会干涉你了，你有了独立自主权，你已经有了你自己出入大门的钥匙。

"Latchkey"
Ranks of latchkey kids approach 7 million
Maternal Employment and Latchkey Adolescents
Latchkey Hero: Masculinity, Class and the Gothic in Eric Kripke's Supernatural
The effect of a latchkey situation on a child's educational success
Radio advertising to women in Twenties America: “A latchkey to every home”
The Handbook for Latchkey Children and Their Parents: A Complete Guide for Latchkey Kids and Their Working Parents.
The Handbook for Latchkey Children and Their Parents: A Complete Guide for Latchkey Kids and Their Working Parents.
Research on the Adjustment of Latchkey Children: Role of Background/Demographic and Latchkey Situation Variables
The effectiveness of an after-school program for primary grade latchkey students on precursors of substance abuse.