/euh plom", euh plum"/ , n.
1. imperturbable self-possession, poise, or assurance.
2. the perpendicular, or vertical, position.
[ 1820-30; à plomb according to the plummet, i.e., straight up and down, vertical position ]
Syn. 1. composure, equanimity, imperturbability.
Ant. 1. confusion, discomposure; doubt, uncertainty.