from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb To
focusone's aim; to zoom inand centeron something.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- verb direct onto a point or target, especially by automatic navigational aids
- verb adjust (as by firing under test conditions) the zero of (a gun)
from Wiktionary, Creative Commons Attribution/Share-Alike License
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.
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karpkatamala commented on the word zero in
It does not zero in on a phenomenon or stake out unclaimed ground in a subfield.
January 18, 2018