n. A white spot, as a white streak on a horse's face.n. An ignis fatuus.Same as shime.n. Broadly, in machinery, a thin slip (usually of metal, but often of other material) used to fill up space caused by wear, or placed between parts liable to wear, as under the cap of a pillow-block or journal-box.n. In stone-working and quarrying, a plate used to fill out the space at the side of a jumper-hole, between it and a wedge used for separating a block of stone, or for contracting the space in fitting a lewis into the hole.n. A shim-plow (which see, under plow).To wedge up or fill out to a fair surface by inserting a thin wedge or piece of material.n. An imperfect shingle, thicker at one side than the other; also, an imperfect stave for a bucket.