#disappearance  the event of passing out of sight
  exclusion:  appearance.happening
  supertype:  happening__occurrence__natural_event__naturalevent  an event that happens
  subtype:  evanescence  the event of fading and gradually vanishing from sight; "the evanescence of the morning mist"
  subtype:  vanishing.disappearance  a sudden or mysterious disappearance
  subtype:  receding__fadeout  a slow or gradual disappearance

No statement uses or specializes disappearance; click here to add one.