v. ex·pired, ex·pir·ing, ex·pires
1. To come to an end; terminate: My membership in the club has expired.
2. To breathe one's last breath; die: The patient expired early this morning.
3. To exhale; breathe out.
1. To breathe (something) out.
2. Archaic To give (something) off.
[Middle English expiren, from Old French expirer, from Latin exspīrāre : ex-, ex- + spīrāre, to breathe.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.