Another can mean 'one more of the same kind'. It is used with singularcountable nouns.

• We need another person to finish the work. (= We need one more person to finish the work.)
• He has bought another car.
• Could I have another cup of coffee?

With uncountable and plural nouns, we normally use 'more', not another .

• Would you like some more milk? (NOT …another milk) 
  

However, another can be used before a plural noun in expressions with fewor a number.

• We will wait for another few days. 
  

Another can also mean 'one that is different'.

• I think we should paint it another colour.