Definition of self-motion in US English:



  • Movement produced by oneself or itself; voluntary or spontaneous motion.

    • ‘Sometimes what is essential to the soul appears to be its power of thinking and reasoning; sometimes it is the power of self-motion.’
    • ‘Everyone is familiar with the impression of self-motion experienced when watching a moving train through the windows of a stationary train.’
    • ‘Vection illusion is the sensation of self-motion induced by relative movement of viewed objects.’
    • ‘Third, although space and time are infinite, matter is spatio-temporally finite, and being endowed only with vis inertiae it has no power of self-motion.’
    • ‘Immediately after the cessation of motion stimulation, the observer reports self-motion in the same direction as the previous section.’