"آن" is a Persian word that translates to "that" in English. It is commonly used in the Persian language to refer to something that is distant from the speaker. This word helps in distinguishing between objects or ideas that are near and those that are further away. In Persian grammar, "آن" can function as a demonstrative pronoun. It is often used in sentences to specify a particular item or concept, making communication clearer. For example, one might say "آن کتاب" which means "that book," indicating a specific book that is not close to the speaker.