Endorse Definition

ĕn-dôrs

endorsed, endorses, endorsing, indorsed, indorses, indorsing

verb

endorsed, endorses, endorsing

To write on the back of (a document)

Webster's New World

To write a note, title, etc. on (a document)

Webster's New World

To give approval to; support; sanction.

To endorse a candidate.

Webster's New World

To state, as in an advertisement, that one approves of (a product, service, etc.), often in return for a fee.

Webster's New World

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.

American Heritage

Synonyms:

Antonyms:

Antonyms:
denounce. See syn. study at approve.approve
censure
denounce
condemn
protest
oppose
repel
disapprove
reject
unauthorize

noun

(heraldry) A diminutive of the pale, usually appearing in pairs on either side of a pale.

Wiktionary

Other Word Forms of Endorse

Noun

Singular:

endorse

Plural:

endorses

Origin of Endorse

Alteration influenced by Medieval Latin indorsare of Middle English endosse, from Old French endosser (“to put on back”), from Latin dossum, alternative form of dorsum (“back”), from which also dorsal (“of the back”). That is, the ‘r’ was dropped in Latin dossum, which developed into Old French and then Middle English endosse, and then the ‘r’ was re-introduced into English via the Medieval Latin indorsare, which had retained the ‘r’. Note that the alternative spelling indorse also uses the initial ‘i’ from Latin (in-, rather than en-), but this form is now rare.

From Wiktionary
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 en–¹ Latin dorsum back

From American Heritage Dictionary of the English Language, 5th Edition