What does buying market share mean?

buying market share meaning in Law Dictionary

The trader borrows money (at interest) to purchase a stock and hopes because of it to rise. Many industrialized countries have regulations that want that if the borrowing is based on collateral from other shares the investor has outright, it could be no more than a certain portion of those various other stocks' worth.

buying market share meaning in Business Dictionary

purchase of a more substantial range customers through suprisingly low (or loss-making) prices under the assumption that they can continue steadily to obtain the company even when the costs tend to be raised.