1. (noun)sanction, countenance, endorsement, indorsement, warrant, imprimatur formal and explicit approval "a Democrat usually gets the union's endorsement"
Definitions of 'imprimatur'
Webster 1913 Dictionary
1. (noun)imprimatur a license to print or publish a book, paper, etc.; also, in countries subjected to the censorship of the press, approval of that which is published
Definition of imprimatur 
