Read the dictionary definition of indorsement. All definitions for this word.
1. the act of endorsing
1. a star athlete can make a lot of money from endorsements
2. a signature that validates something
1. the cashier would not cash the check without an endorsement
3. formal and explicit approval
1. a Democrat usually gets the union's endorsement
4. a speech seconding a motion
1. do I hear a second?
5. a promotional statement (as found on the dust jackets of books)
1. the author got all his friends to write blurbs for his book