Definition of trading noun from the Oxford Advanced Learner's Dictionary

  

trading

 noun
noun
BrE BrE//ˈtreɪdɪŋ//
 
; NAmE NAmE//ˈtreɪdɪŋ//
 
[uncountable] Economy
 
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the activity of buying and selling things new laws on Sunday trading (= shops being open on Sundays) Supermarkets everywhere reported excellent trading in the run-up to Christmas. Shares worth $8 million changed hands during a day of hectic trading. See related entries: EconomyExtra examples In heavy trading, the 100-share index closed down 38 points. Sole trading is where an individual carries on his or her own business. a Wall Street dealer jailed for insider trading a code of practice for fair trading Shares worth $8 million changed hands during a day of hectic trading. Stores everywhere reported excellent trading in the run-up to Christmas. They have introduced new laws on Sunday trading.
See the Oxford Advanced American Dictionary entry: trading