'Soporific' definitions:

Definition of 'soporific'

From: WordNet
adjective
Sleep inducing [syn: soporific, soporiferous, somniferous, somnific, hypnogogic, hypnagogic]
adjective
Inducing mental lethargy; "a narcotic speech" [syn: narcotic, soporiferous, soporific]
noun
A drug that induces sleep [syn: soporific, hypnotic]

Definition of 'Soporific'

From: GCIDE
  • Soporific \Sop`o*rif"ic\ (?; 277), a. [L. sopor a heavy sleep (akin to somnus sleep) + facere to make. See Somnolent, Fact.] Causing sleep; tending to cause sleep; soporiferous; as, the soporific virtues of opium. [1913 Webster]
  • Syn: Somniferous; narcotic; opiate; anodyne. [1913 Webster]

Definition of 'Soporific'

From: GCIDE
  • Soporific \Sop`o*rif"ic\, n. A medicine, drug, plant, or other agent that has the quality of inducing sleep; a narcotic. [1913 Webster] Soporose