Definition of "immunise"

immunise

verb
third-person singular simple present immunises, present participle immunising, simple past and past participle immunised
1. (British spelling) Alternative spelling of immunize.
  Quotations
  Planning the resignalling element was problematic because immunising the new colour-light signals for an electric railway was costly and unnecessary if electrification was not approved.
  2020 April 8, David Clough, “How the West Coast wiring war was won”, in Rail, page 63