What is Second Life
Second Life is a virtual world you can join and visit to meet people from all over the world, roleplay, or even build the life you couldn't have in real life.
Noob/Noobie/Newbie
Real Life (RL) Person that has never been in SL (Second Life) before
Alt
Alternate account; second, third, fourth, or so on, account of someone that is still active in SL on a main account. Alts can be created for several reasons, including a safe place to keep money, RP (roleplay), entering a lifestyle, a vacation from your sl job, asking for help if your main has a major issue...
Returner
Someone that used to have an account in SL before but has been gone for a long time. They may be back in their old account or have created a new one to start over, this can include starting over due to drama, even if you have not been gone long