[mass noun]the administering of a sedative drug to produce a state of calm or sleep 镇静状态,施以镇静剂 he was distraught with grief and under sedation. 他悲痛欲狂,已服用了镇静剂。 ■a state of calm or sleep produced by a sedative drug (镇静剂引发的)平静(或睡眠)状态
语源
mid 16th cent.: from French sédation or Latin sedatio(n-), from sedare 'settle' (see sedate)