Shares in a company whose earnings are expected to grow at an above-average rate relative to the market.
Also known as a "glamor stock".
Taobiz explains Growth Stock
A growth stock usually does not pay a dividend, as the company would prefer to reinvest retained earnings in capital projects. Most technology companies are growth stocks.
Note that a growth company's stock is not always classified as growth stock. In fact, a growth company's stock is often overvalued.