1. The process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas
   "The ionisation of the gas allowed for the creation of plasma";
   - ionization
    
2. The condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge)
   "the ionisation of a gas";
   - ionization

Derived forms: ionisations

Type of: action, activity, condition, natural action, natural process, status

Encyclopedia: Ionisation