Metal Detector dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Dream Explanations - Anonymous

Dreams of a metal detector either symbolize that you are looking for treasure or looking for fault. You may be feeling cynical as you look for a hidden agenda and/or feeling on the defensive, wanting to see with the X-ray eyes. Perhaps you are testing your metal to detect how solid you really are.
Source: Strangest Dream Explanations Author: Dream Explanations - Anonymous

Interpretation 2 — myjellybean

To dream about a metal detector suggests that you are looking within yourself for the strength to deal with a challenging situation.
Source: My Dream Interpretation Author: myjellybean