What does it mean to dream about magnet?
A magnet usually stands for attraction or a pull you cannot easily resist, so it helps to ask what was drawing you and whether you welcomed it.
Four ways to read it
Each reading below comes from a named tradition and a cited source, so you can see where it came from and decide what fits your dream.
Freud
Freud would read the invisible pull between bodies as a plain image of desire and the force of attraction. Being drawn against your will can carry a wish you are reluctant to own.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
Jung might see the magnet as the pull of something in the unconscious that draws you toward it, for good or ill. What sticks to it can show what you are gathering to yourself.
Jungian concept (our summary).Modern
Continuity ties a magnet to waking thoughts about attraction, influence, and a person or aim you feel pulled toward. A strong pull in a dream often matches a real draw you are weighing.
Continuity hypothesis (our summary).Mythological
The lodestone that draws iron held an air of the marvellous in old lore, a hidden force seen as kin to charm and enchantment. Its silent pull stood for the power one thing can hold over another.
Rosmerta Publishing editorial synthesis (after Brewer; Frazer).