Definitions for "Red shift"
A phenomenon in which light from distant sources is red-shifted because space is expanding (and objects in the universe are receding from other objects due to this expansion).
shift toward the red in the spectra of light reaching us from the stars in distant galaxies
An increase of light wavelengths, caused by a motion away from the observer. So called because red light has longer wavelengths than blue light.
A phenomenon sometimes noted on the McKenzie maps of Canoe Country where the portage and campsite indicators, printed as a red overlay to the base topographic map, are misaligned, leading to imprecise placement of those features.