Merriam-Webster's Collegiate® Dictionary, 11th Edition
ANOTHER
I. adjective
Date: 12th century
different or distinct from the one first considered , some other , being one more in addition to one or more of the same kind ,
II. pro noun
Date: 13th century
an additional one of the same kind ; one more, one that is different from the first or present one, one of a group of unspecified or indefinite things