Zero is the number that means no things or no amount. It is used in math and in daily life to show nothing or none.
I have zero apples left.
The temperature is zero degrees.
Zero can mean the start or base point when we measure or count things. It is the place where we begin.
Start counting from zero.
The ruler begins at zero centimeters.
Zero can be used to say someone is not important or not good. It is a negative way to describe a person.
He felt like a zero after failing.
Don't act like a zero in class.
In science, zero can mean the lowest temperature possible, where atoms stop moving. It is called absolute zero.
Absolute zero is minus 273 Celsius.
Scientists study matter near zero Kelvin.
Zero as a verb means to set something to zero or reset it. It is often used with machines or equipment.
We need to zero the scales now.
She zeroed the counter quickly.
To zero can also mean to aim or adjust a weapon to hit a target accurately. This use is common in shooting sports.
The shooter zeroed the rifle before shooting.
He zeroed in on the small target.
