adj.
- Strong, energetic, and active in mind or body; robust. See synonyms at healthy.
- Marked by or done with force and energy. See synonyms at active.
vigorousness vig'or·ous·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.