missing (adj.)
1. 找不到的, 不在的, 丟失的
that cannot be found or that is not in its usual place, or at home
e.g. I never found the missing piece.
2. 去除的, 損毀的
that has been removed, lost or destroyed and has not been replaced
3.失蹤的
(of a person) not present after an accident, battle, etc. but not known to have been killed
4. 缺少的, 未被包括在內的not included, often when it should have been