possess : Idioms & Phrases

All`-pos*sessed" adjective

Definitions

1. Controlled by an evil spirit or by evil passions; wild. Colloq.

Webster 1913

• adjective satellite in full control of your faculties
  equanimous; self-contained; self-collected; collected; poised.
  
  • 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

WordNet

Self"-pos*sessed" adjective

Definitions

1. Composed or tranquill in mind, manner, etc.; undisturbed.

Webster 1913