autograph - definition and synonyms

verb [transitive] 

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/ˈɔːtəˌɡrɑːf/
present tense
I/you/we/theyautograph
he/she/itautographs
present participleautographing
past tenseautographed
past participleautographed
  1. if someone famous autographs a book, photograph etc, they sign their name on it