DTM Synonym of D2M: Initialism of direct-to-mobile. Adjective Synonym of D2M: Initialism of direct-to-mobile. Synonyms: D2M DtM Noun Initialism of digital terrain model. Synonym of D2M: Initialism of direct-to-mobile. Synonyms: D2M DtM Forms DTMs Phrase Initialism of dye(d) to match.