'Sedation' definitions:

Definition of 'sedation'

From: WordNet
noun
A state of reduced excitement or anxiety that is induced by the administrative of a sedative agent
noun
The administration of a sedative agent or drug [syn: sedation, drugging]

Definition of 'Sedation'

From: GCIDE
  • Sedation \Se*da"tion\, n. [L. sedatio.] The act of calming, or the state of being calm. [R.] --Coles. [1913 Webster]