1. a person or business that sells something
2. a product that sells in a particular way or amount
Usage: often used in compounds like ‘bestseller’

Examples

• The seller agreed to lower the price of the house.
• She became a successful seller of handmade jewelry online.
• The car seller showed us several different models.
• This book has been a bestseller for months.
• The novel was a poor seller despite good reviews.
• Street sellers offered fresh fruit and vegetables.
• The antique seller had many rare items in his shop.