Synonyms for Missing:

adj.

absent (adjective)
absent, nonexistent, vacant, gone, elsewhere, truant, departed, abstract, void, no-show, out, empty, wanting, Omitted, lacking, away.
excluded (adjective)
Omitted.
gone, absent (adjective)
lost, lacking, wanting, away, removed, Omitted, short.
incomplete (adjective)
unfulfilled, sectional, patchy, discontinuous, unfinished, unachieved, Unaccomplished, fractional, insufficient, short, unattained, scanty, Curtailed, fragmentary, partial, segmental, immature, undone, lacking, unsatisfactory, deficient, embryonic, incomplete.

n.

unattainable, unavailable, in absentia. battle cry, belligerent, aggressor, Beleaguered, bombed-out, black out, active duty, active service, air cover, absence. get. missing (noun)
lacking, nonexistent, absent, lost, wanting.

v.

disappeared (verb)
removed.
lacking (verb)
Needing, Requiring, Defaulting.

Other synonyms:

unattainable, unavailable. Other relevant words:
belligerent, get, aggressor, removed, unavailable, lost, Beleaguered, bombed-out, unattainable, absence.

Usage examples for missing

  1. There were two missing – The Case of Richard Meynell by Mrs. Humphrey Ward
  2. As to which, do you happen to notice that one of our fellows is missing – The Triumph of Hilary Blachland by Bertram Mitford
  3. One of the animals bit the bob- cat, and now the creature's missing – Blake's Burden by Harold Bindloss