Wiktionary
alt. (context business finance English) A person who practices the short-term investment strategy of trading stocks or other investment instruments by selling any given security during the same market day within which it was purchased. n. (context business finance English) A person who practices the short-term investment strategy of trading stocks or other investment instruments by selling any given security during the same market day within which it was purchased.
Wikipedia
A day trader is a trader who adheres to a trading style called day trading. This involves buying and subsequently selling financial instruments (e.g. stocks, options, futures, derivatives, currencies) within the same trading day, such that all positions will usually be closed before the market close of the trading day. Depending on one's trading strategy, it may range from several to hundreds of orders a day.
Usage examples of "day trader".
Everyone had feared that one day Trader wouldn't be the first to blink, and either he or Ryan would catch the last train west.
As I stepped inside, I saw Milo striding toward me, looking like a day trader whose portfolio had just imploded.
So she wants me to trade for my life, and I don't get to lay my formal claim against her unless I can outperform her pet day trader, that punk from Marseilles.
Since Bob quit his job as a financial analyst and became an ardent day trader, doing very well in that belly-wrenching profession, he found strength in patience and solace in the kitchen.