Pronunciation: (pur-sis'tuns, -zis'-), [key]
1. the act or fact of persisting.
2. the quality of being persistent: You have persistence, I'll say that for you.
3. continued existence or occurrence: the persistence of smallpox.
4. the continuance of an effect after its cause is removed. Also,per•sist'en•cy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.