Definite article

A definite article indicates that its noun is known or obvious to the listener. It may be something that the speaker has already mentioned, or it may be something uniquely specified. The definite article in English, for both singular and plural nouns, is «the». There is no definite article in Persian. A noun is definite in itself. That is, the lack of an article indicates that the noun is definite.

To talk about something known or obvious to the listener:

To talk about all the things referred to by a noun:

To talk about something that is unique:

NOTE Definite articles typically arise from demonstratives. The English definite article «the», derives from an Old English demonstrative. In Persian, demonstrative adjectives can be used to indicate definiteness. When translating into English, you should usually use «the» rather than English demonstrative adjectives (this, that, these, those).