Easton's Bible Dictionary
The word so rendered (dagan) in Genesis 27:28, 37, Numbers 18:27, Deuteronomy 28:51, Lamentations 2:12, is a general term representing all the commodities we usually describe by the words corn, grain, seeds, peas, beans. With this corresponds the use of the word in John 12:24.
In Genesis 41:35, 49, Proverbs 11:26, Joel 2:24 ("wheat"), the word thus translated (bar; i.e., "winnowed") means corn purified from chaff. With this corresponds the use of the word in the New Testament (Matthew 3:12; Luke 3:17; Acts 7:12). In Psalm 65:13 it means "growing corn."
Noah Webster's New International Dictionary of the English Language
1. (n.) A thickening of the epidermis at some point, esp. on the toes, by friction or pressure. It is usually painful and troublesome.
2. (n.) A single seed of certain plants, as wheat, rye, barley, and maize; a grain.
3. (n.) The various farinaceous grains of the cereal grasses used for food, as wheat, rye, barley, maize, oats.
4. (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.
5. (n.) A small, hard particle; a grain.
6. (v. t.) To preserve and season with salt in grains; to sprinkle with salt; to cure by salting; now, specifically, to salt slightly in brine or otherwise; as, to corn beef; to corn a tongue.
7. (v. t.) To form into small grains; to granulate; as, to corn gunpowder.
8. (v. t.) To feed with corn or (in Scotland) oats; as, to corn horses.
9. (v. t.) To render intoxicated; as, ale strong enough to corn one.