endorsement

a promotional statement (as found on the dust jackets of books)

• “the author got all his friends to write blurbs for his book”

a speech seconding a motion

• “do I hear a second?”

formal and explicit approval

• “a Democrat usually gets the union”

a signature that validates something

• “the cashier would not cash the check without an endorsement”

the act of endorsing

• “a star athlete can make a lot of money from endorsements”