The term "partner firm" refers to a business or company that has formed an alliance, collaboration, or strategic partnership with another entity. In such arrangements, both parties work together towards common goals and share resources in order to achieve success. The relationship between partner firms can vary greatly depending on the nature of their agreement, but generally speaking, they cooperate closely in areas such as marketing, research and development, production or distribution, among others. By joining forces with another company, both partners hope to benefit from increased efficiency, expanded reach, and improved competitiveness in their respective markets.