the GNU version of the Collaborative International Dictionary of English
n. The act of disappearing; cessation of appearance; removal from sight; vanishing.
The Century Dictionary and Cyclopedia
n. The act of disappearing; removal or withdrawal from sight or knowledge; a ceasing to appear or to exist: as, the disappearance of the sun, or of a race of animals.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the act of leaving secretly or without explanation
n. ceasing to exist
n. the event of passing out of sight
n. gradually ceasing to be visible
Word Usage
"They have all gone, disappeared; and their disappearance is the only decent thing they ever did."