- GSM GSM noun [uncountable]1. TELECOMMUNICATIONS Global System for Mobiles; a system that makes it possible for people to use mobile (= telephones you can carry with you and use in any place):
• France Telecom wanted the Swiss PTT to pay a fee for the use of the French GSM network.2. abbreviation for General Sales Manager
* * *GSM UK US /ˌdʒIːesˈem/ noun [S] COMMUNICATIONS► ABBREVIATION for global system for mobile telecommunications: a technical system for mobile phones used in many countries: »
In the early 1990s the EU picked the GSM standard for Europe's mobile networks.GSM equipment/network/system »
The phone company is expanding their GSM network.»
Financial and business terms. 2012.