Definition of trading noun from the Oxford Advanced American Dictionary

 

trading

 noun
noun
NAmE//ˈtreɪdɪŋ//
 
[uncountable]
 
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 the activity of buying and selling things Chicago has long been a trading center for agricultural products of the Midwest. Shares worth $8 million changed hands during a day of hectic trading. see also insider trading
See the Oxford Advanced Learner's Dictionary entry: trading