Meanings
The phrase possibly comes from adjusting a sighting mechanism of a firearm to minimise the discrepancy between where the sight points and where a bullet lands on a target.
How to pronounce "zero in":
To focus one's aim; to zoom in and center (on something).
Example: "The pilot zeroed in on the bunker and launched a guided missile."
Example: "Zero in and find a watermark in the image."
To successfully narrow down a search (for).
Example: "We have zeroed in on the source of the problem."
Example: "See if you can zero in on the caller."
To concentrate or focus one's attention (on a task).
Example: "One member of the check fraud team will zero in on the fingerprints."
To converge (on).
Example: "At the spring sale, everyone zeroed in on the bargain clothes."
