Definition of "Portfolio" :

noun: the role of the head of a government department

"He holds the portfolio for foreign affairs."

noun: a large, flat, thin case for carrying loose papers or drawings or maps; usually leather

"He remembered her because she was carrying a large portfolio."

noun: a list of the financial assets held by an individual or a bank or other financial institution

"They were disappointed by the poor returns on their stock portfolio."

noun: a set of pieces of creative work collected to be shown to potential customers or employers

"The artist had put together a portfolio of his work."