A2
If someone or something is missing, you cannot find them because they are not in their usual place.
Dictionary examples:
My homework is missing. The dog must have eaten it! (0.0)
My keys are missing. They must be on vacation! (0.0)
My motivation is missing. Have you seen it anywhere? (0.0)
Her father has been missing since September 1992. (13.0)
Have you found those missing documents? (13.3)
One of my blue socks is missing. (29.1)