From Longman Business Dictionarydematerializede‧ma‧te‧ri‧a‧lize /ˌdiːməˈtɪəriəlaɪz-ˈtɪr-/ (also dematerialise British English) verb [transitive] FINANCE in trading shares, bonds etc, to change from a system based on CERTIFICATES (=official documents showing ownership) to PAPERLESS TRADING (=where records of ownership are kept on computer)The government is encouraging all investors to dematerialize their shares. —dematerialization (also dematerialisation British English) noun [uncountable]Paper-based registered shares not submitted to the Company for dematerialization will be sold through the Athens Exchange.