Dictionary.com

blueshift

or blue shift

[ bloo-shift ]
/ ˈbluˌʃɪft /
Save This Word!

noun Astronomy.

a shift toward shorter wavelengths of the spectral lines of a celestial object, caused by the motion of the object toward the observer.

QUIZZES

QUIZ YOURSELF ON AFFECT VS. EFFECT!

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.

Origin of blueshift

First recorded in 1950–55; blue + shift
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for blueshift

blueshift
/ (ˈbluːˌʃɪft) /

noun

a shift in the spectral lines of a stellar spectrum towards the blue end of the visible region relative to the wavelengths of these lines in the terrestrial spectrum: a result of the Doppler effect caused by stars approaching the solar systemCompare redshift
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for blueshift

blue shift

See under Doppler effect.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Learn A New Word Right Now!