Indorsement meaning : The act or quality of endorsing An amendment or annotation to an insurance contract or other official document (such as a driving licence). An instructor's signed acknowledgement of time practising specific flying skills. (certification) Permission to carry out a specific skill or application in a field in which the practitioner already has a general licence. Sponsorship, in means of money, by a company, business or enterprise. Support from an important, renowned figure of a media (celebrity, politics, sports, etc.), to get back up.