se·date1 / siˈdāt/ • adj. calm, dignified, and unhurried: in the old days, business was carried on at a rather more sedate pace. ∎ quiet and rather dull: sedate suburban domesticity.DERIVATIVES: se·date·ly adv.se·date·ness n.se·date2 • v. [tr.] calm (someone) or make them sleep by administering a sedative drug: she was heavily sedated.