adj.
- Making severe demands; rigorous: an exacting instructor.
- Requiring great care, effort, or attention: an exacting task. See synonyms at burdensome.
exactingness ex·act'ing·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.