en·dorse (ĕn-dôrs) also in·dorse (ĭn-)
tr.v. en·dorsed, en·dors·ing, en·dors·es also in·dorsed or in·dors·ing or in·dors·es
a. To express approval of or give support to, especially by public statement; sanction: endorse a change in policy; endorse a political candidate.
b. To recommend (a product), often in exchange for payment, as in an advertisement.
2. To write one's signature on the back of (a check) to obtain the amount payable or to make the amount payable available to a third party or to the bearer.
3. To write one's signature on the back of (an instrument) to transfer the rights available under that instrument to another party.
4. To place (one's signature), as on a contract, to indicate approval of its contents or terms.
5. To acknowledge (receipt of payment) by signing a bill, draft, or other instrument.
[Middle English endosen, to sign (a document, originally by writing on its back), approve, from Anglo-Norman endosser, from Medieval Latin indorsāre : Latin in-, upon, in; see EN-1 + Latin dorsum, back.]
en·dorser, en·dorsor n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.