The phrase "be superannuated" means to become outdated or no longer useful. Some synonyms for this phrase include being retired, being phased out, becoming obsolete, being replaced, or being surpassed. It can also imply the end of a useful life for an item or a person's career. If a product or technology is no longer effective or profitable, it can be considered superannuated. An employee who is nearing retirement age may also be considered superannuated. It's important to recognize when something has become superannuated to ensure you are not wasting time or resources on something that is no longer effective.