- tightly or immovably wedged in.
- noting a tooth so confined in its socket as to be incapable of normal eruption.
- driven together; tightly packed.
- densely populated or crowded; overcrowded: an impacted school district.
- (of a tooth) unable to erupt, esp because of being wedged against another tooth below the gum
- (of a fracture) having the jagged broken ends wedged into each other
