File Extension OVLDEF File Format Gestionnaire d' extensions Overload Definition OVLDEF stands for Gestionnaire d' extensions Overload Definition. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question CBR File Information Import PDFs with Open Office extensions and more How do you prepare for snow emergencies?