Dictionary Home » The American Heritage Dictionary of Idioms » set in motion

set in motion

set in motion idiom

Start something moving, give impetus to something, as in A press conference set the new project in motion. It is also put as set the wheels in motion, as in Let's set the wheels in motion for the new library wing. This idiom dates from about 1800. It was preceded by put in motion, which dates from the mid-1600s.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.