Relating to the deflective forces produced by, or arising from, the Earth's rotation: In school, Jenifer learned about the geostrophic force that was caused by the revolution or turning of the world.

A wind, ocean current, or other such movement in which the horizontal force is exactly balanced by the apparent force exerted on a moving object by the rotation of the Earth: When studying oceanography, Jill learned that the Gulf Stream, the Kuroshio Current, the Antarctic Circumpolar Current, and the Agulhas Current were all examples of geostrophic currents.