a merchant who sells goods at retail
"The local retailer sold fresh produce directly to customers from their back garden stand."
A retail sales company or salesman.
"The new electronics retailer opened a branch downtown to compete with our local store."
In plain English: A retailer is a business that sells products directly to regular customers for personal use.
"The local retailer sells fresh groceries and household items."
Usage: A retailer refers to any business that sells goods directly to consumers, such as stores like Walmart or individual shop owners. This term distinguishes the final point of sale from wholesalers who sell in bulk to other businesses for resale.
The word retailer is formed by adding the suffix "-er" to retail. It was first used in English to describe a person who sells goods directly to consumers rather than in bulk.