: 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
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In their crosshairs was education minister and trusted Modi lieutenant Dharmendra Pradhan, on whose watch the leak had happened. Rhea Mogul, CNN Money, 28 July 2026 Such outlets may become wary of pursuing stories that could put them in the Administration’s crosshairs. Ruth Marcus, New Yorker, 18 July 2026 Erez picks it up, stares through the crosshairs, as a voice on the phone instructs them how to aim and shoot. Marisa Fox, Rolling Stone, 16 July 2026 Block has been in regulators’ crosshairs more than almost any other fintech over the last two years, and the court order could shed light on a major case pending against Zelle. Danielle Chemtob, Forbes.com, 10 July 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 31 Jul. 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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