What is an indefinite article?
a determiner ( a and an in English) that introduces a noun phrase and implies that the thing referred to is nonspecific (as in she bought me a book ; government is an art ; he went to a public school ). Typically, the indefinite article is used to introduce new concepts into a discourse.
The Spanish singular indefinite article (English a, an) is _______ before a masculine noun and _____ before a feminine noun.
un, una