trm trizone • trna · · · Info · Definitions · Synonyms · Characters · · trm · · Text Latin · · Script 3 · · Length 1 · · Syllables Definitions · · · (noun) the coordinated universal time when a transmission is sent from Earth to a spacecraft or other celestial body. Synonyms: transmission time, TRM. · · Noun Definition 1 Synonyms · · · transmission time · · Synonym 1 Characters · · m latin small letter m U+006D r latin small letter r U+0072 t latin small letter t U+0074