1. A statement or indication that inspires confidence; a guarantee or pledge: gave her assurance that the plan would succeed.
a. Freedom from doubt; certainty about something: Do you have any assurance that the work will be done well?
b. Self-confidence: "I tried imitating the assurance they carried themselves with" (Alec Wilkinson).
3. Chiefly British Insurance, especially life insurance.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.