1. 一連の注射によって有機体を血清に敏感にすること(rendering an organism sensitive to a serum by a series of injections)
2. 特定の出来事や状況(特に感情的な出来事や状況)に非常に敏感になるプロセス(the process of becoming highly sensitive to specific events or situations (especially emotional events or situations))
3. 敏感である状態(抗原に対してのような)(the state of being sensitive (as to an antigen))