self-possessed   (TTS Sound)

The adj self-possessed has 1 sense

• collected, equanimous, poised, self-collected, self-contained, self-possessed -- (in full control of your faculties; "the witness remained collected throughout the cross-examination"; "perfectly poised and sure of himself"; "more self-contained and more dependable than many of the early frontiersmen"; "strong and self-possessed in the face of trouble")