Throughout time is a phrase that refers to something existing or happening continuously from the past to present. There are several other phrases or synonyms that can be used to replace the phrase throughout time. These include over time, across time, for centuries, through the ages, over the years, throughout history, since the dawn of time, from antiquity to present day, and so on. Each of these phrases can convey the same meaning and can be used interchangeably depending on the context in which they are being used. No matter which phrase or synonym is used, it emphasizes the continuity or longevity of an event, concept, or thing.