v. de·flat·ed, de·flat·ing, de·flates
a. To release contained air or gas from.
b. To collapse by releasing contained air or gas.
2. To reduce or lessen the size or importance of: Losing the contest deflated my ego.
a. To reduce the amount or availability of (currency or credit), effecting a decline in prices.
b. To produce deflation in (an economy).
To be or become deflated: The balloon deflated slowly.
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.