See Also: relativity(dictionary)
relativity(encyclopedia)
relativity(dictionary)

relativity (iou)



relativity noun. M19.
[from RELATIVE + -ITY.]
The fact or condition of being relative, relativeness. M19.
Physics. The dependence of observations on the relative motion of the observer and the observed object; the branch of physics that deals with the description of space and time allowing for this. L19.
general theory of relativity, general relativity a theory extending the special theory of relativity to systems accelerating with respect to one another, covering gravitation and the curvature of space-time. special theory of relativity, special relativity a theory based on the principles that all uniform rectilinear motion is relative and that light has the same speed in a vacuum for all observers, regarding space-time as a four-dimensional continuum, and modifying previous conceptions of geometry.