a file differs from a rasp in having the furrows made by straight cuts of a chisel, either single or crossed, while the rasp has coarse, single teeth, raised by the pyramidal end of a triangular punch.
3. A shrewd or artful person. Will is an old file spite of his smooth face. (Thackeray) bastard file, cross file, etc. See bastard, cross, etc. Cross-cut file, a file having two sets of teeth crossing obliquely. File blank, a steel blank shaped and ground ready for cutting to form a file. File cutter, a maker of files. Second-cut file, a file having teeth of a grade next finer than bastard. Single-cut file, a file having only one set of parallel teeth; a float. Smooth file, a file having teeth so fine as to make an almost smooth surface.