- an official license to print or publish a book, pamphlet, etc., especially a license issued by a censor of the Roman Catholic Church.Compare nihil obstat.
- sanction or approval; support: Our plan has the company president’s imprimatur.
- RC Church a licence granted by a bishop certifying the Church’s approval of a book to be published
- sanction, authority, or approval, esp for something to be printed
1640, Modern Latin, literally “let it be printed,” the formula of a book licenser, third person singular present subjunctive passive of Latin imprimere “to print” (see impress). Originally of state license to print books, later only of Roman Catholic Church.