soporific UK /ˌsɒp.əˈɹɪf.ɪk/US /ˌsɑp.əˈɹɪf.ɪk/adjective 2noun 2forms 3 adjective2 •Tending to induce sleep. •(figurative) Boring, dull.The professor delivered a soporific lecture. noun2 •Something inducing sleep, especially a drug.The doctor prescribed a soporific to help the patient sleep. •(figurative) Something boring or dull. formssoporifics · more soporific · most soporific
