a. [ L. planarius level. See Plane, a. ] Of or pertaining to a plane. [ R. ] [ 1913 Webster ]

a. [ LL. plenarius, fr. L. plenus full. See Plenty. ] Full; entire; complete; absolute; as, a plenary license; plenary authority. [ 1913 Webster ]

A treatise on a subject should be plenary or full. I. Watts. [ 1913 Webster ]

Plenary indulgence (R. C. Ch.), an entire remission of temporal punishment due to, or canonical penance for, all sins. --
Plenary inspiration. (Theol.) See under Inspiration. [ 1913 Webster ]

n. (Law) Decisive procedure. [ Obs. ] [ 1913 Webster ]