Trans-dimensional being
A trans-dimensional being or trans-dimensional energy creature was a lifeform that originated from or existed in a trans-dimensional realm.

The Sphere-Builders, who lived within the trans-dimensional disturbance in the Delphic Expanse, were an example of a trans-dimensional species. ()

In 2380, a hostile trans-dimensional energy creature appeared aboard the , where it was promptly tackled and subdued by Ensign Beckett Mariner. Although Mariner released the creature after it created a new tricorder and power cell for her, the act of creating the aforementioned objects had weakened the being significantly. When it tried to attack Captain Carol Freeman, it flew onto her shirt, where it quickly dissipated. ()

The Alliance of synthetic life may have included artificial lifeforms from multiple universes. ()
Lifeform classifications