'sensitization' definitions:

Definition of 'sensitization'

(from WordNet)
noun
The state of being sensitive (as to an antigen) [syn: sensitization, sensitisation]
noun
(psychology) the process of becoming highly sensitive to specific events or situations (especially emotional events or situations) [syn: sensitization, sensitisation]
noun
Rendering an organism sensitive to a serum by a series of injections [syn: sensitizing, sensitising, sensitization, sensitisation]