Definition of big box noun from the Oxford Advanced American Dictionary

 

big box

 noun
noun
 
(also big-box store)
 
(informal)
 
jump to other results
a very large store, built on one level and located outside a town, which sells goods at low prices When a big-box store opens, smaller retailers often go out of business. Efforts were made to limit big-box expansion.
See the Oxford Advanced Learner's Dictionary entry: big box