When Someone Is Unaccounted?

The definition of unaccounted for is someone or something that is not where expected or cannot be found. An example of unaccounted for is when a student is absent from school but no one called to say he wouldn't be there and no one knows where he is.

What does it mean if someone is unaccounted for?

—used to say that what happened to someone or something is not known Many people were unaccounted for after the disaster. A great deal of money remains unaccounted for.

What does not accounted for means?

adjective. not accounted for; not understood; unexplained: an explosion resulting from some unaccounted-for mechanical failure.