v. t.
Corrugated iron,
Corrugated paper,
a. [ L. corrugatus, p. p. of corrugare; cor-+ rugare to wrinkle, ruga wrinkle; of uncertain origin. ] Wrinkled; crumpled; furrowed; contracted into ridges and furrows. [ 1913 Webster ]
adj. shaped into parallel folds alternately grooved and ridged;
n. [ Cf. F. corrugation. ] The act corrugating; contraction into wrinkles or alternate ridges and grooves. [ 1913 Webster ]
n. [ NL.; cf. F. corrugateur. ] (Anat.) A muscle which contracts the skin of the forehead into wrinkles. [ 1913 Webster ]