1. past tense of zero; adjusted or set to zero
2. aimed precisely at a target
Usage: military; firearms
3. focused attention completely on something
Usage: often used with ‘in on’

Examples

• The technician zeroed the scale before weighing the samples.
• She zeroed her rifle scope at the shooting range.
• The detective zeroed in on the main suspect.
• After the power outage, all the clocks needed to be zeroed.
• The sniper zeroed his weapon before the mission.
• The team zeroed in on the problem and found a solution.
• He zeroed the odometer when he bought the used car.