In the context of CorelDRAW, the "CDR format" refers to the native file format used by the graphic design software CorelDRAW. CDR stands for CorelDRAW file. It is a proprietary file format used by CorelDRAW to save vector graphics, bitmaps, text, and other design elements. The CDR format allows users to create, edit, and save complex graphic designs while preserving all layers, colors, and effects.