A hand, sometimes yours, sometimes not, points a finger. At a person, a place, an object, sometimes at you. The gesture is accusing, or simply indicative.
The emotional tone
Depending on the direction, discomfort or clarity. Being pointed at doesn't produce the same emotion as pointing.
Symbolic meaning
Pointing in a dream symbolizes designation, what must be seen, what must be faced. Being pointed at refers to a guilt or responsibility you preferred to ignore.
The palmistry link
In palmistry, the index is Jupiter's finger, ambition, authority, affirmation. Dreaming of a pointing finger is often dreaming of your own inner authority seeking its direction.
What this dream signals in your life
This dream arrives when a truth must be named, to oneself, to another, sometimes to a group. It doesn't ask to accuse; it asks to point out what deserves to be seen.
The pointing finger in the dream doesn't always judge. Often, it simply shows where to look.