noun.
A stillness or pause; something that quiets or represses; removal from activity; especially: death.
noun.
Final settlement (as of a debt).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
euphemisms for death (based on an analogy between lying in a bed and in a tomb)
Word Usage
"Quietus is a short form of the term quietus est or abeinde recessit quietus, the formulae used in the Court of the Exchequer to show that an account has been correctly presented and cleared."