GSM Definition
gēĕsĕm
noun
A wireless transmission standard for digital cell phones, used worldwide.
Webster's New World
A digital cell-phone system using this standard.
Webster's New World
abbreviation
Grams per square metre, (unit for measuring the weight of paper)
Wiktionary
(telecommunications) Global System for Mobile communications.
Wiktionary
(electronics) Groupe Spécial Mobile.
Wiktionary
(LGBT) Gender and/or sexual minority.
Wiktionary
Origin of GSM
Originally short for French Groupe Spécial Mobile Special Mobile Group now officially short for Global System for Mobile Communications
From American Heritage Dictionary of the English Language, 5th Edition