sedate
1. [ adjective ] characterized by dignity and propriety
Synonyms: staid
Related terms: decorous
2. [ adjective ] dignified and somber in manner or character and committed to keeping promises
Synonyms: sober grave solemn
Examples:

"a grave God-fearing man" "a quiet sedate nature" "as sober as a judge" "a solemn promise" "the judge was solemn as he pronounced sentence"

Related terms: serious
3. [ verb ] cause to be calm or quiet as by administering a sedative to
Synonyms: tranquilize tranquillize tranquillise calm
Examples:

"The patient must be sedated before the operation"

Related terms: stimulate affect hypnotize composure ataractic sedation
Similar spelling:   seated
  seeded
  sudate