aplomb
NounWordNet 3.0
Noun (1)
- great coolness and composure under strain“keep your cool”Synonyms: assurednesscoolpoisesang-froid
Webster's Dictionary (GCIDE)
Aplomb \A`plomb"\, n. [F., lit. perpendicularity; ? to + plomb lead. See Plumb.] Assurance of manner or of action; self-possession. [1913 Webster]