Philosophy of Time in Relativity: Time in relativity theory modified mathematically and used in combination with the usual three spatial dimensions to specify the location in space and time of events.
             Dimension, in geometry, a property of space. In common, experience the world is three-dimensional. Three measures-breadth, width, and depth-are needed to define a volume. In mathematics and physics the concept of dimension is used more abstractly; spaces of four or even an infinite number of dimensions are commonly used. The spaces with many dimensions that are used in mathematics and physics have no commonsense meaning, but are very powerful tools that are crucial to subjects like quantum physics. In addition, dimension need not always be a whole number. For example, fractals are mathematical objects that have fractional dimension.
             Time, conscious experience of duration, the period during which an action or event occurs. Time is also a dimension representing a succession of such actions or events. Time is one of the fundamental quantities of the physical world, similar to length and mass in this respect. The concept that time is a fourth dimension-on a par with the three dimensions of space: length, width, and depth-is one of the foundations of modern physics. Time measurement involves the establishment of a time scale in order to refer to the occurrence of events. The precise determination of time rests on astronomical and atomic definitions that scientists have established with the utmost mathematical exactness.
             Time, conscious experience of duration, the period during which an action or event occurs. Time is also a dimension representing a succession of such actions or events. Time is one of the fundamental quantities of the physical world, similar to length and mass in this respect. The concept that time is a fourth dimension-on a par with the three dimen
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