Noun
The quality or state of being simultaneous; simultaneousness.
Source: Webster's dictionaryThe idea of the vital movement of the world and its movement is simultaneity. Robert Delaunay
Polyphonic painting is superior to music in that, here, the time element becomes a spatial element. The notion of simultaneity stands out even more richly. Paul Klee
Simultaneity in light is harmony, the rhythm of colors which creates the Vision of Man. Robert Delaunay
Every linguistic sign is located on two axes: the axis of simultaneity and that of succession. Roman Jakobson
The artists of our culture, 'the antennae of the race,' had tuned in to the new ground and begun exploring discontinuity and simultaneity. Marshall McLuhan
If the definition of simultaneity is given from a moving system, the spherical surface will result when Einstein's definition with є = 1/2 is used, since it is this definition which makes the velocity of light equal in all directions. Hans Reichenbach