Aplomb
[ə'plɒm] or [ə'plɑm]
Definition
(noun.) great coolness and composure under strain; 'keep your cool'.
Inputed by Jill--From WordNet
Definition
(n.) Assurance of manner or of action; self-possession.
Checker: Lucille
Definition
n. the perpendicular perpendicularity: self-possession coolness.
Editor: Peter