to lament; to bewail; to complain.-to lament; to mourn over; as, to plain a loss.-without elevations or depressions; flat; level; smooth; even. see plane.-open; clear; unencumbered; equal; fair.-not intricate or difficult; evident; manifest; obvious; clear; unmistakable.-void of extraneous beauty or ornament; without conspicious embellishment; not rich; simple.-not highly cultivated; unsophisticated; free from show or pretension; simple; natural; homely; common.-free from affectation or disguise; candid; sincere; artless; honest; frank.-not luxurious; not highly seasoned; simple; as, plain food.-without beauty; not handsome; homely; as, a plain woman.-not variegated, dyed, or figured; as, plain muslin.-not much varied by modulations; as, a plain tune.-in a plain manner; plainly.-level land; usually, an open field or a broad stretch of land with an even surface, or a surface little varied by inequalities; as, the plain of jordan; the american plains, or prairies.-a field of battle.-to plane or level; to make plain or even on the surface.-to make plain or manifest; to explain.