What does my decile number mean?

I have tried looking on line and find a clear answer. On my account under acedemic information, it says my gpa and decile, which is 2. Can anyone tell me what this means? Thank you very much

Your rank is between 10 and 20 percentile.

top decile= top 20% of students / those whose GPA is in the 80-100%
second decile = next level down or those whose GPA is in the 60-80%
etc etc

@menloparkmom decile is tenths. 10% each. Second decile is between 10 and 20%ile as @NYDad513 stated.