From Longman Dictionary of Contemporary Englishcorncorn /kɔːn $ kɔːrn/ ●●○ S3 noun 1 [uncountable] British EnglishHBPTAC plants such as wheat, barley, and oats or their seeds fields of corn an ear of corn (=the top part of this plant where the seeds grow)2 
[uncountable] a) American English a tall plant with large yellow seeds that grow together on a cob (=long hard part), which is cooked and eaten as a vegetable or fed to animals SYN maize British English All our chickens are fed on corn. → corn on the cob b) HBPTACthe seeds of this plant → sweetcorn3 [countable]MI a painful area of thick hard skin on your foot
[uncountable] a) American English a tall plant with large yellow seeds that grow together on a cob (=long hard part), which is cooked and eaten as a vegetable or fed to animals SYN maize British English All our chickens are fed on corn. → corn on the cob b) HBPTACthe seeds of this plant → sweetcorn3 [countable]MI a painful area of thick hard skin on your footExamples from the Corpus
corn• This was one of the largest silk mills in the vicinity, although it started life as a corn mill.• Quite possibly it was a corn mill partially converted for fulling.• The former corn mill is owned by Bristol City Museum and is open to the public.• Some people think fresh corn on the cob needs no embellishment.• Forty acres of corn burns up in July or is flooded out or beaten to a pulp by hail.• The chickens are raised on a diet of corn and other grains.• However, a surplus or excess supply still exists and competition among sellers will once again bid down the price of corn.• They wore large cotton hats to keep off the sun, and gloves to protect their hands from the corn.• Saute, stirring often, until corn is lightly browned.ear of corn• They would let lawyers know they were available by having ears of corn or hay protruding from their shoes.• Select ears of corn that have uniform rows of kernels and dark brown silks at the husk end.• There is also a beautiful altar rail decorated with ears of corn, grapes, etc. - all references to the Sacrament.Origin corn 1. Old English2. (1300-1400) Old French corne “horn, corner”; → CORNER1 