What 군 means
The syllable can represent several roots. Hangul is Korea's alphabet. Hanja are Chinese characters used in Korean: 軍 means military, 郡 county, 君 a respectful address, and 群 group. In Korea's Goryeo and Joseon dynasties, 君 was also a title.
In the fifteenth century, Hangul was devised to make Korean writing more accessible than Chinese-character and Idu writing; Idu adapted Chinese characters for Korean. The pronunciation dictionary Dongguk Jeongun records 군.
Is 군 formal? It is respectful; fit depends on the relationship.
A bare 군 does not automatically mean “army.”
What it means when someone sends it to you
3 readingsQuestions people ask
1Why does 군 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 군
군\AD70Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.