What is the meaning of trading?

noun

• Buying or selling securities or commodities.

verb

• Engage in the trade of.
  • usage: "he is merchandising telephone sets"
  • synonyms: trade, merchandise
• Turn in as payment or part payment for a purchase.
  • usage: "trade in an old car for a new one"
  • synonyms: trade, trade in
• Be traded at a certain price or under certain conditions.
  • usage: "The stock traded around $20 a share"
  • synonyms: trade
• Exchange or give (something) in exchange for.
  • synonyms: trade, swap, swop, switch
• Do business; offer for sale as for one's livelihood.
  • usage: "She deals in gold"; "The brothers sell shoes"
  • synonyms: deal, sell, trade