Corn

1. n. A small, hard particle; a grain.
2. n. A thickening of the epidermis at some point, esp. on the toes, by friction or pressure. It is usually painful and troublesome.
3. n. A single seed of certain plants, as wheat, rye, barley, and maize; a grain.
4. n. The various farinaceous grains of the cereal grasses used for food, as wheat, rye, barley, maize, oats.
5. n. The plants which produce corn, when growing in the field; the stalks and ears, or the stalks, ears, and seeds, after reaping and before thrashing.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.