"ИЛИ" is a Russian word that translates to "OR" in English. It is a conjunction used to present alternatives or choices between two or more options. For example, in a sentence like "Ты хочешь чай ИЛИ кофе?" (Do you want tea OR coffee?), it indicates a selection between the two beverages. In logic and mathematics, "ИЛИ" represents a logical operation that results in true if at least one of the conditions is true. This concept is fundamental in fields such as computer science and philosophy, where it helps in decision-making processes and problem-solving.