Idioms and Phrases with to good purpose
to good purpose
To effective use, as in A donation to the homeless shelter will be put to good purpose. This idiom was first recorded in 1553. Also see to little or no purpose.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.