† ˈplanary,a.Obs.rare. [ad. L. plānāri-us level, f.plān-um a plane.] = planar. 1668Wilkins Real Char. 185 Compound Figures of Magnitude Planary, expressible by closed Lines.1730–6Bailey (folio), Planary, of or pertaining to a plane, plain, even, smooth. [Hence in J. and mod. Dicts.]