gravitational-wave

Noun

gravitational wave (plural gravitational waves)

1. (relativity) A fluctuation in spacetime caused by accelerating mass, which propagates as a wave at the speed of light.
   • It is therefore apparent that the existence of gravitational waves can be deduced from general relativity just as the existence of electromagnetic waves can be deduced from Maxwell's theory.1941, Leopold Infeld, Quest: The Evolution of a Scientist, New York, N.Y.: Doubleday, Doran & Co., →OCLC, page 261

   Synonyms:

   GW

2. (dated, proscribed) A gravity wave.
   • These layers also permit visual observation of the well-known "gravitational waves," which were suggested by Helmholtz and have been investigated theoretically at some length. It is frequently suggested that these atmospheric waves may be connected with signal fading.1951, Donald E. Kerr, editor, Propagation of Short Radio Waves [IEE Electromagnetic Waves Series; 24], London: Peter Peregrinus Ltd on behalf of The Institution of Electrical Engineers, →ISBN, page...