Vendor

In a contract, the Vendor refers to the seller.

Additional Sources

Duhaime Legal Dictionary

The seller; the person selling.

Lect Law Library

A seller. One who disposes of a thing in consideration of money.

The Free (Legal) Dictionary

Seller; an individual who transfers property for sale; merchant; retail dealer; supplier.

The term vendor is frequently used in reference to an individual who sells real property.

Wikipedia

A vendor, or a supplier, is a supply chain management term meaning anyone who provides goods or services to a company. A vendor often manufactures inventoriable items, and sells those items to a customer.