1. corrugate - Adjective
2. corrugate - Verb
Wrinkled; crumpled; furrowed; contracted into ridges and furrows.
To form or shape into wrinkles or folds, or alternate ridges and grooves, as by drawing, contraction, pressure, bending, or otherwise; to wrinkle; to purse up; as, to corrugate plates of iron; to corrugate the forehead.
Source: Webster's dictionarycorrugate iron Source: Internet