- Also called cross wire. one of the fine wires or fibers, strands of spider web, or the like, crossing in a focal plane of an optical instrument to center a target or object or to define a line of sight.
- one of the marks that aid in the positioning of overlaying images for correct registration in printing.Compare register(def 11b).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for crosshair
When the silver splotch drifted by the crosshair, he punched the stop button and looked at the indicator.
He kept his eyes on the crosshair of the peeper, one hand over the timer button.
It may be that the mount has been bent or the crosshair ring shifted.
By azimuth, do you refer to the crosshair which is sometimes referred to as the windage crosshair?