: a fine wire or thread in the focus of the eyepiece of an optical instrument used as a reference line in the field or for marking the instrumental axis
used figuratively to describe someone or something being targeted as if through an aiming device having crosshairs
The tactics landed the company's top brass in the crosshairs of the Securities and Exchange Commission.Houston Chronicle

Examples of crosshair in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Cracks are getting harder to hide Russia’s Amazon-style retail giant is now in Ukraine’s crosshairs. Sam Meredith, CNBC, 17 Aug. 2026 By the end of the episode, Joe’s suspicions have put the Ukrainian operative in the CIA’s crosshairs. Samantha Stutsman, PEOPLE, 9 Aug. 2026 While Crutchfield’s business was soon dominating Molt’s—raking in millions in reptile sales and trades every year—his reckless spending and imports soon put him squarely in the Feds’ crosshairs. Rory Doherty, Time, 6 Aug. 2026 If Kurtz made his foray into politics from off the radar, Barham entered in a crosshair. Josh Crutchmer, Rolling Stone, 4 Aug. 2026 See All Example Sentences for crosshair

Word History

First Known Use

1684, in the meaning defined above

Time Traveler
The first known use of crosshair was in 1684

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Cite this Entry

“Crosshair.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crosshair. Accessed 21 Aug. 2026.

Kids Definition

cross hair

noun
: one of the very thin wires or threads in the eyepiece of an optical instrument (as a microscope) used as a reference line
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