Sole

1. The horny substance under a horse's foot, which protects the more tender parts.
2. Being or acting without another; single; individual; only.
3. Any one of several American flounders somewhat resembling the true sole in form or quality, as the California sole (Lepidopsetta bilineata), the long-finned sole (Glyptocephalus zachirus), and other species.
4. A piece of timber attached to the lower part of the rudder, to make it even with the false keel.
5. To furnish with a sole; as, to sole a shoe.
6. The seat or bottom of a mine; -- applied to horizontal veins or lodes.
7. The bottom of a shoe or boot, or the piece of leather which constitutes the bottom.
8. Single; unmarried; as, a feme sole.
9. The bottom of an embrasure.
10. The bottom or lower part of anything, or that on which anything rests in standing.
11. The bottom of the body of a plow; -- called also slade; also, the bottom of a furrow.
12. The bottom of the foot; hence, also, rarely, the foot itself.
13. Any one of several species of flatfishes of the genus Solea and allied genera of the family Soleidae, especially the common European species (Solea vulgaris), which is a valuable food fish.