adj. Having a soothing, calming, or tranquilizing effect; reducing or relieving anxiety, stress, irritability, or excitement. n. An agent or a drug having a soothing, calming, or tranquilizing effect. [Middle English, from Old French sedatif, from Medieval Latin sēdātīvus, from Latin sēdātus, past participle of sēdāre, to calm; see SEDATE1.] |
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