Definition: Compare Prices of All Top-Level Domains. The .directory domain extension is a part of the new wave of generic top-level domain extensions (gTLDs) launched by ICANN. It is a flexible and generic term, which makes it functional for industries, corporations, or individuals that serve as a resource hub or directory for any type of product, service, or information. It can be an ideal choice for businesses like online directory services, HR comapnies, or anyone who wants to create a specialized hub for categorizing and organizing links. The .directory domain provides an opportunity for businesses and individuals to define their web presence with a relevant, memorable, and marketable domain name.