- user group,
- user interface,
- user's fee,
- user-defined key,
Examples from the Web for username
The user selects a username and then adds the usernames of friends, acquaintances, or strangers.
When you tap on a username, the app sends a push notification to that user.
Rachelle (going by the username “Rollingonwheelz”): I love her and have no grudge.