Closedown refers to the process of shutting down or closing a business or establishment. The antonyms of this word include terms such as open, operate, function, run, and continue. When a business is open or operating, it means that it is actively providing services or products to customers. A functional business is one that is efficient and productive in its operations. If a business is running, it means that it is actively engaged in its operations and delivering its services. Likewise, when a business is continuing, it means that it is persistently existing and operating without any disruption. In summary, the antonyms for closedown are significant in illustrating the opposite state or condition of this word.