[1] : The Collaborative International Dictionary of English v.0.48

immune \immune"\, a. l. immunis. see immunity.
   1. exempt; protected. -- immu"nize, v. t.
      1913 webster

   2. med. protected from disease due to the action of the
      immune system, especially by having been inoculated
      against or previously exposed to a disease.
      pjc

   3. med. of or pertaining to the immune system or the
      components of the immune system.
      pjc

   4. not responsive; as, immune to suggestion.
      pjc
see also:
immunity immu"nize 

[2] : The Collaborative International Dictionary of English v.0.48

immune \immune"\, n.
   one who is immune; esp., a person who is immune from a
   disease by reason of previous affection with the disease or
   inoculation.
   webster 1913 suppl.

[3] : WordNet (r) 2.0

immune
     adj 1: relating to the condition of immunity; "the immune system"
     2: secure against; "immune from taxation as long as he resided
        in bermuda"; "immune from criminal prosecution"
     3: relating to or conferring immunity to disease or infection
        syn: resistant
     4: usually followed by `to' not affected by a given
        influence; "immune to persuasion"
     n : a person who is immune to a particular infection
see also:
resistant 

[4] : Moby Thesaurus II by Grady Ward, 1.0

38 moby thesaurus words for "immune":
   chartered, excepted, excused, exempt, exempted, favored, immunized,
   inoculated, insured, insusceptible, intact, invulnerable,
   irresponsible, let off, licensed, nonsusceptible to disease,
   permitted, privileged, protected, released, resistant, safe,
   safe and sound, secure, spared, unaccountable, unaffected,
   unanswerable, undamaged, unharmed, unhurt, unliable, unscathed,
   unsubject, unsusceptible, unthreatened, untouched, vaccinated

Immune >> I Words
Immune, definition of term: Immune
immune_pag1.html

Acquired Immune >> A Words
Acquired Immune, definition of term: Acquired Immune
acquired+immune_pag1.html