Rectification meaning : The action or process of rectifying. The determination of a straight line whose length is equal to a portion of a curve. The truncation of a polyhedron by replacing each vertex with a face that passes though the midpoint of each edge connected to the vertex; an analogous procedure on a polytope of dimension higher than 3. The adjustment of a globe preparatory to the solution of a proposed problem. (chemical engineering) Purification of a substance through repeated or continuous distillation.