Definition of "evanescence"

evanescence

/ˌɛv.əˈnɛs.n̩s/

noun
countable and uncountable, plural evanescences
1. The act or state of vanishing away; disappearance.
  Quotations
  We suffer equal pain from the pertinacious adhesion of unwelcome images, as from the evanescence of those which are pleasing and useful;
  1 September, 1759, Samuel Johnson, The Idler
2. The event of fading and gradually vanishing from sight.