/ kɔːn; NAmE kɔːrn/ noun
1.
( BrE ) [ U ] any plant that is grown for its grain, such as wheat ; the grain of these plants :
a field of corn
ears / sheaves of corn
corn-fed chicken
2.
[ U ] ( NAmE ) = maize
—see also corncob , corn on the cob
3.
[ U ] ( NAmE ) = sweetcorn
4.
[ C ] a small area of hard skin on the foot, especially the toe, that is sometimes painful
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WORD ORIGIN
senses 1 to 3 Old English , of Germanic origin; related to Dutch koren and German Korn .
sense 4 late Middle English : via Anglo-Norman French from Latin cornu horn.