Degree of Amines :
 
Nitrogen atom  connected with 1 carbon is known as 
 1 0 Amine  or Primary Amine.  In other words Primary amine has -NH
2 group.  
Nitrogen atom  connected with 2 carbon is known as 
 2 0 Amine  or Secondary Amine.  In other words Secondary amine has -NH- group.  
Nitrogen atom  connected with 3 carbon is known as 
 3 0 Amine  or Tertiary Amine.  In other words Tertiary  amine has N atom without any Hydrogen atom.