An angelic order of the second hierarchy, traditionally associated with governance, command, and the ordering of lower angelic ministries.
Dominions, also called Dominations or Lordships, form the highest order of the second hierarchy. In medieval theology they are associated with appointing and ordering the ministries carried out by lower angelic ranks.
Etymology
From Latin dominationes, “lordships” or “rulerships.”
Sculptor Notes
Dominions do not possess a single universally fixed visual attribute. Crowns, sceptres, or orbs may appear in later schemes, but the sculptor should verify the specific iconographic program before assigning such symbols.
References
https://www.newadvent.org/summa/1108.htm