Long: you buy a stock, hold it, later on sell for profit or loss.
Short: you borrow a stock, sell it, hold the money and later on buy the stock back at a lower or higher price you originally sold it for. Then return the stock to the person who lent it to you.
Short: you borrow a stock, sell it, hold the money and later on buy the stock back at a lower or higher price you originally sold it for. Then return the stock to the person who lent it to you.