Sed"a*tive (?), a. [Cf. F. sédatif.] Tending to calm, moderate, or tranquilize; specifically (Med.), allaying irritability and irritation; assuaging pain.

Sed"a*tive, n. (Med.) A remedy which allays irritability and irritation, and irritative activity or pain.

Sed"a*tive (?), a. [Cf. F. sédatif.] Tending to calm, moderate, or tranquilize; specifically (Med.), allaying irritability and irritation; assuaging pain.

Sed"a*tive, n. (Med.) A remedy which allays irritability and irritation, and irritative activity or pain.

• An agent or drug that sedates.
  
• calming, soothing, inducing sleep, tranquilizing