warping meaning in Information Science terminology / glossary / dictionary is:
A twist or bend in a bookcover that occurs after binding or casing, severe enough to prevent the volume from lying flat, usually caused by dampness (click here and here to see examples). In newly bound books, the condition may be caused by differences in the expansion and/or contraction of the materials used in the case or cover. Warping can be minimized in binding by using well-dried boards, endpapers with the grain running from head to foot, and adhesives of low water content and by proper pressing. In libraries, it is controlled by storing books in a dry, well-ventilated place. See also: bowed.