Homonym: zero (Nothing)
Zero is a unique number that represents the absence of quantity. It is neither positive nor negative, making it a special point on the number line. In mathematics, zero plays a crucial role as the identity element for addition, meaning that adding zero to any number does not change its value. For example, 5 + 0 equals 5.
In everyday life, zero is often used to indicate nothingness or a starting point. For instance, when measuring temperature, a reading of zero degrees means there is no heat. Additionally, in sports, a score of zero indicates that a team has not yet scored any points.