zero

ze|ro1 [ `zırou ] (plural ze|roes) noun ***

1. ) count or uncount the number 0:

If x is zero, y must be 3.

a ) uncount a value equal to zero on a SCALE:

Set the timer to zero.

b ) uncount the temperature on the Celsius SCALE at which water freezes:

above/below zero: The temperature was forty below zero.

c ) only before noun used for showing that there is no amount at all of something:

We're likely to see zero growth in the market this year.

astronauts in zero gravity

2. ) uncount INFORMAL nothing at all:

Our chances of success are zero.

3. ) count INFORMAL an insulting word for someone who has no qualities that impress you

zero

ze|ro 2 [ `zırou ] verb

intransitive to set a piece of equipment or control to 0 :

Make sure the meter is level and zeroed.

,zero `in on phrasal verb transitive zero in on someone/something

1. ) to start to give all your attention to a particular person or thing:

The newspapers have zeroed in on his private life.

2. ) to aim at someone or something with a gun or camera