zero in
Verb

zero in

  1. To focus one's aim; to zoom in and center (on something).
    The pilot zeroed in on the bunker and launched a guided missile.
    Zero in and find a watermark in the image.
    • 1981, USENET 15 Sep 1981 on 08 Dec 2006
      When you invoke the VAX C compiler with -p for profiling it generates an assembly-language call to a profiling subroutine for which I substituted my own heap-checker, and that enabled me to zero in on a heap-violation which was caused by an array-out-of-bounds condition.
  2. To successfully narrow down a search (for).
    We have zeroed in on the source of the problem.
    See if you can zero in on the caller.
  3. To concentrate or focus one's attention (on a task).
    One member of the check fraud team will zero in on the fingerprints.
  4. (idiomatic) To converge (on).
    At the spring sale, everyone zeroed in on the bargain clothes.
    • 2019, Barney Ronay, Liverpool’s waves of red fury and recklessness end in joyous bedlam (in The Guardian, 8 May 2019)
      With 79 minutes gone, the most celebrated team of the modern age had been reduced to bunch of mooching, stumbling yellow-shirted spectators. A Champions League season that had seemed to be zeroing in on another coronation for Lionel Messi had been wrenched, gleefully, the other way.
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