1. A room for storage, usually below ground or beneath a building: At the end of the summer, she had 1,000 containers of food stored in the cellar to feed her family through the winter.
2. The lowest level or standing; especially, in the relative standing of athletic teams: The new baseball player started in the cellar on the team; so, the only way to go was up.

1. Someone who exchanges a product or service for money; a vendor: The street seller pushed his cart along the beach, selling ice cream and sodas.
2. An item that is purchased in large numbers and in a specified manner: The store stocked 500 copies of the book based on the review which said it would be a best seller!