The meaning of INCINERATE is to cause to burn to ashes. How to use incinerate in a sentence. to cause to burn to ashes… See the full definition. Games & Quizzes; Games & Quizzes; Word of the Day; Grammar; Wordplay; Word Finder; Thesaurus; Join MWU; Shop; Books; Merch; Settings; My Words; Recents; Account; Log Out