Noah Webster's Dictionary (n.) A field where corn is or has been growing; -- in England, a field of wheat, rye, barley, or oats; in America, a field of Indian corn.

Multi-Version Concordance Cornfield (1 Occurrence) Psalms 72:16 There shall be abundance of grain in the earth upon the top of the mountains; The fruit thereof shall shake like Lebanon: And they of the city shall flourish like grass of the earth. (See JPS)