Category killer

A category killer is a retailer, often a big-box store, that specializes in and carries a large product assortment of a given category.^{: 109–111} Through their wide merchandise selections, low pricing, deep supply, large buying power, and market penetration, they have a comparative advantage over other, smaller retailers, and can greatly reduce the sales of rival retailers within that category, in the area and beyond it.

In essence, they are a price- or discount-based specialist mass-retailer.^: 13 Chains such as OfficeMax, Best Buy, Barnes & Noble, and Hobby Lobby have been considered category killers.

Once typically found in power centers, increasingly they are found in or adjacent to (as an outbuilding of) repurposed traditional malls.

Large category killer stores are mostly in mid- and large-sized cities, because a large population is required to be feasible.^: 33