problemn.[F. problme, L. problema, fr. Gr. anything thrown forward, a question proposed for solution, fr. to throw or lay before; before, forward + to throw. Cf. Parable. ]()1. A question proposed for solution; a matter stated for examination or proof; hence, a matter difficult of solution or settlement; a doubtful case; a question involving doubt.(Bacon.)2. (Math.) Anything which is required to be done; as, in geometry, to bisect a line, to draw a perpendicular; or, in algebra, to find an unknown quantity.()()Plane problem (Geom.), a problem that can be solved by the use of the rule and compass. -- Solid problem (Geom.), a problem requiring in its geometric solution the use of a conic section or higher curve.()a.[L. problematicus, Gr. : cf. F. problmatique.] Having the nature of a problem; not shown in fact; questionable; uncertain; unsettled; doubtful.()Diligent inquiries into remote and problematical guilt leave a gate wide open to . . . informers. (Swift.)