sedation

noun Medicine/Medical.

1. the calming of mental excitement or abatement of physiological function, especially by the administration of a drug.
2. the state so induced.

noun

1. a state of calm or reduced nervous activity
2. the administration of a sedative

n.early 15c., “alleviation of pain;” 1540s, “act of making calm,” from Middle French sédation and directly from Latin sedationem (nominative sedatio) “a quieting, assuaging, a calming,” noun of action from past participle stem of sedare (see sedate (adj.)). n.

1. Reduction of anxiety, stress, irritability, or excitement by administration of a sedative agent or drug.
2. The state or condition induced by a sedative.