/ ɪnˈdɔːs; NAmE ɪnˈdɔːrs/ verb [ vn ]
1.
to say publicly that you support a person, statement or course of action :
I wholeheartedly endorse his remarks.
Members of all parties endorsed a ban on land mines.
2.
to say in an advertisement that you use and like a particular product so that other people will want to buy it
3.
to write your name on the back of a cheque so that it can be paid into a bank account
4.
[ usually passive ] ( BrE ) to write details of a driving offence on sb's driving licence :
You risk having your licence endorsed.
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WORD ORIGIN
late 15th cent. (in the sense write on the back of ; formerly also as indorse ): from medieval Latin indorsare , from Latin in- in, on + dorsum back.