/ ˈbærən; NAmE / noun
1.
a nobleman of the lowest rank. In Britain, barons use the title Lord ; in other countries they use the title Baron .
2.
a person who owns or controls a large part of a particular industry :
a press baron
drug barons
For more information see the Cultural Guide
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WORD ORIGIN
Middle English : from Old French , from medieval Latin baro , baron- man, warrior, probably of Germanic origin.