Added 9 October 2026 self-possessed adjective Categories: Describing WordsObscure Words adjective ! Definition from Wiktionary (CC BY-SA). More about self-possessed at Wordnik → Where our words come from → In full control of one's faculties, and having a firm belief in one's abilities; confident, assured and poised. Related Words: poisedcomposedself-containedequanimouscollectedself-collectedconfidentself-assuredself-confidentself-controlledselfsecure Back to today's word