1.  disappear(v = verb.change) go away, vanish - get lost, as without warning or explanation; "He disappeared without a trace"
Antonym: appear
Derived form noun disappearance₁, noun disappearing₁
Sample sentences: Sam and Sue %s; These cars won't %s

2.  disappear(v = verb.perception) go away, vanish - become invisible or unnoticeable; "The effect vanished when day broke"
Derived form noun disappearance₂, noun disappearance₃
Sample sentences: The moon will soon %s

3.  disappear(v = verb.change) vanish - cease to exist; "An entire civilization vanished"
Antonym: appear
Derived form noun disappearance₃
Sample sentences: Something ----s

4.  disappear(v = verb.change) evaporate, melt - become less intense and fade away gradually; "her hopes evaporated after years of waiting for her fiance"; "her resistance melted under his charm"
Sample sentences: Something ----s; Something is ----ing PP

disappear, v.intr.
1 cease to be visible; pass from sight.
2 cease to exist or be in circulation or use (trams had all but disappeared).

Derivative:
disappearance n.

VB  not exist, have no existence, be null and void, cease to exist, pass away, perish, be extinct, become extinct, die out, disappear, melt away, dissolve, leave not a rack behind, go, be no more, die, annihilate, render null, nullify, abrogate, destroy, take away, remove, obliterate, extirpate.

VB  vanish, evaporate, fade, dissolve, melt away, disappear.

VB  escape, scape, make one's escape, effect one's escape, make good one's escape, break jail, get off, get clear off, get well out of, echapper belle, save one's bacon, save one's skin, weather the storm, escape scot-free, elude &c, make off, march off, give one the slip, slip through the hands, slip through the fingers, slip the collar, wriggle out of prison, break out, break loose, break loose from prison, break away, slip away, get away, find vent, find a hole to creep out of, disappear, vanish.

VB  depart, go away, take one's departure, set out, set off, march off, put off, start off, be off, move off, get off, whip off, pack off, go off, take oneself off, start, issue, march out, debouch, go forth, sally forth, sally, set forward, be gone, hail from, leave a place, quit, vacate, evacuate, abandon, go off the stage, make one's exit, retire, withdraw, remove, vamoose, vamose, go one's way, go along, go from home, take flight, take wing, spring, fly, flit, wing one's flight, fly away, whip away, embark, go on board, go aboard, set sail' put to sea, go to sea, sail, take ship, hoist blue Peter, get under way, weigh anchor, strike tents, decamp, walk one's chalks, cut one's stick, take leave, say good bye, bid goodbye, disappear, abscond, entrain, inspan.

VB  disappear, vanish, dissolve, fade, melt away, pass, go, avaunt, evaporate, vaporize, be gone, leave no trace, leave 'not a rack behind', go off the stage, suffer an eclipse, undergo an eclipse, retire from sight, be lost to view, pass out of sight, lose sight of, efface.