|Origin:||immunis, from munis 'ready for service'|
1M [not before noun]
someone who is immune to a particular disease cannot catch it:
Once we've had the disease, we're immune for life.
the reaction of the body's immune system to something that is harmful:
HIV is a progressive disease which the immune response ultimately fails to control.
3 [not before noun]
not affected by something that happens or is done
The Labour Party is not immune to new ideas.
4 [not before noun]
specially protected from something unpleasant
The senior members of the group appeared to be immune from arrest.