sensitization n 1: the state of being sensitive (as to an antigen) [syn: {sensitization}, {sensitisation}] 2: (psychology) the process of becoming highly sensitive to specific events or situations (especially emotional events or situations) [syn: {sensitization}, {sensitisation}] 3: rendering an organism sensitive to a serum by a series of injections [syn: {sensitizing}, {sensitising}, {sensitization}, {sensitisation}]