1 lost, or not in the right or usual place 失踪的；遗失的；不在适当或惯常的位置的: a missing person 一名失踪者Two files have gone missing from my office. 我办公室里有两份文件不见了。

2 (used about a person) not present after a battle, an accident, etc but not known to have been killed （指人在战斗、事故等后）失踪的，下落不明的: Many soldiers were listed as missing in action. 许多士兵被列为在战斗中失踪。

3 not included, often when it should have been 缺掉的；缺少的: Fill in the missing words in the text. 把文章中缺漏的字填上去。