(n) a savings account showing no activity (other than posting interest) for some specified period, Example:the dormant account reverted to the state under escheat laws
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ See Dormant, a. ] (Arch.) A large beam in the roof of a house upon which portions of the other timbers rest or “ sleep.” Arch. Pub. Soc. -- Called also dormant tree, dorman tree, dormond, and dormer. Halliwell.