Definition of sedative noun from the Oxford Advanced Learner's Dictionary

 

sedative

 noun
noun
BrE BrE//ˈsedətɪv//
 
; NAmE NAmE//ˈsedətɪv//
 
 
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a drug that makes somebody go to sleep or makes them feel calm and relaxed synonym tranquillizer The doctor gave her a mild sedative to help her sleep. Wordfinderdoze, dream, drowsy, insomnia, oversleep, REM, sedative, sleep, soporific, tired Word Origin late Middle English: from Old French sedatif or medieval Latin sedativus, from Latin sedat- ‘settled’, from the verb sedare ‘settle’, from sedere ‘sit’.

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