The Collaborative International Dictionary
Sempiternity
Sempiternity \Sem`pi*ter"ni*ty\, n. [L. sempiternitas.]
Future duration without end; the relation or state of being
sempiternal.
--Sir M. Hale.
Wiktionary
sempiternity
n. (context philosophy English) existence within time but infinitely into the future; as opposed to eternity, understood as existing outside time
WordNet
sempiternity
n. the property of being perpetual (seemingly ceaseless) [syn: perpetuity]