1. pertaining to or noting a very large retail store that does a high volume of business and usually has low prices: Big-box retailers claim that they create jobs and boost tax revenue.

Origin of big-box

First recorded in 1990–95
Related formsbig box, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for big-box

Contemporary Examples of big-box