The phrase "big retailers" refers to large companies that sell a wide variety of products to the public, often with multiple locations. Full definition
The majority of big retailers will include an assessment centre as part of their recruitment process. (targetjobs.co.uk)
Apparently it is common practice for bigger retailers in commercial real estate to sign leases with conditions that prevent their landlord from renting to other businesses that would create competition. (therealdaily.com)
Many mothers like to shop online at bigger retailers that have an abundance of options. (babygearspecialist.com)