The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- Prompt to act, move, or express oneself; ready: I gave my unhesitating approval.
- Unfaltering; steadfast.
- un·hesˈi·tatˌing·ly adverb